It's already a given that Jayson Tatum isn't just one of the NBA's most promising prospects. At this point in time, the Boston Celtics' All-Star forward is already among the league's best players. And the scary thing about him is that he's just entering his prime, as evidenced by how he played against future Hall of Fame inductees Kevin Durant and Giannis Antetokounmpo during the playoffs.

With Beantown getting past the Milwaukee Bucks, Tatum's stock in the card market is shining brighter than ever. We take a look below at how his NBA cards have been performing as the Celtics go on to the Eastern Conference Finals against the Miami Heat.

Jayson Tatum's incredible postseason run

After three seasons of going deep into the playoffs, Jayson Tatum was finally eliminated in the first round by Kevin Durant and the Brooklyn Nets last year. During that series, the Slim Reaper averaged 32.6 points, 7.4 rebounds, 3 assists, 1.4 steals, and 2.2 blocks to lead his team to a 4-1 series over the Celtics. In comparison, Tatum himself wasn't too bad with averages of 30.6 points, 5.8 rebounds, 4.6 assists, 1.2 steals, and 1.6 blocks per game against the Nets.

That early exit didn't exactly hype Tatum and the Celtics up to fans as the current season started. Nevertheless, they made an impressive turn at the start of the year by improving their defense and playing better as a team on the court. This improvement helped them clinch the second seed and the right to face the seventh-place Nets in this year's playoffs.

During the first round, Tatum would get the chance to avenge their early exit last year by sweeping Durant, Kyrie Irving, and the Nets. In the four games he played against Brooklyn recently, the All-Star forward notched 29.5 points on 45/41/86 shooting splits while making 4.5 rebounds, 7.3 assists, and 1.8 steals in 41.7 minutes on the court. In comparison, Durant himself looked inferior next to Tatum when he posted 26.3 points on 38/33/89 splits, 5.8 rebounds, 6.3 assists, and a single steal per game.

Tatum's amazing performance against Kevin Durant, one of the greatest players of all time, is one that has clearly set him apart from other stocks in the NBA card market. The thing is, his series against Giannis Antetokounmpo and the Milwaukee Bucks cemented his value further in the hobby.

Right before Game 7 commenced, Tatum had been playing rather well for the past six contests against the Bucks. With an average of 41.6 minutes on the court, the Celtics' forward averaged 28.3 points, 6.3 rebounds, 5 assists, 1.2 steals, and 1.2 blocks. The deciding game was no different for the All-Star.

In 36 minutes, Tatum notched 23 points, 6 rebounds, and 8 assists to help Boston make it back to the Eastern Conference Finals after one year of being removed from it. Although his matchup with Durant was considered a one-sided contest, his series against Antetokounmpo was certainly a harder one.

Now that the Celtics are surging towards an equally-hot Miami Heat team, it remains to be seen whether they can maintain their momentum for a potential seven-game series. What's certain at this point in time is that those Jayson Tatum cards in the market right now are looking to be a hot target for collectors and investors alike, especially now that he's living up to his full potential as a number one option.

The state of Jayson Tatum rookie cards

As the regular season ended, Tatum's stock was one of the hottest in the card market. As the Celtics advance to the Eastern Conference Finals, that hasn't changed one bit.

Jayson Tatum, Celtics, NBA Cards

In a three-month graph by Card Ladder, Tatum's PSA 10 2017 Prizm Silver rookie card started off at $927 and has gone up by 61% over the course of that period. What's surprising about this particular card is that it rose up to a peak of $1,996, tumbled down to $1,170, and spiked back up to $1,495 in less than a month.

It should be remembered that the Celtics' recent win hasn't affected Tatum's current card value yet. It's expected to rise up more in the coming days since the forward has been playing really well against the Nets and Bucks. In the event he plays well against Jimmy Butler and the Heat, those Jayson Tatum cards will really go nuclear.

The verdict on Jayson Tatum cards

At this point in time, the move to make for those Jayson Tatum cards is to sell them right away. The All-Star's value in the market is looking good and profits can be made by selling his cards in the soonest time possible.

Jayson Tatum, Celtics, NBA Cards

This move is the safest since there is no 100% guarantee that Tatum can lead the Celtics to make the Finals and capture the championship this year. Collectors who are entertaining this thought can leave a couple of Jayson Tatum rookie cards, especially those short printed parallels, as a guarantee just in case Boston potentially makes the promised land.

In any case, Tatum's performance this postseason is proof that he's ascending right before our very eyes, especially with some players about to exit their respective primes. It won't be long now before the NBA is run by a select few stars with Hall of Fame-level potential in a few years. Expect the Celtics' All-Star forward to be one of those guys.