Technically there is a limit on points, but it’s probably in the billions.
For example 2,147,483,647 or 4,294,967,295 are limits of regular integers in SQL depending if you can go in the negatives or not, which you can’t, but Gangnam Style broke Youtube at over 2 billion even though views can’t be negative for example. The option has to be specifically selected.
I don’t know if anyone would ever reach that amount of points in their live, but many billionaires would exceed that amount in real life money. Compare the amount of points you earn per year with the amount of money you earn per year (WAY more unless you’re Jeff bezos) and maybe it’s possible to reach the limit if you collect all sets for 10 years and discard all of your cards.
Can anyone calculate how many points all series (that are still available) are worth?