is this round based?
so let's say i deposit now but then for 1 year nobody and then somebody deposits very much.
How long will this last?
In theory, a ponzi can last forever as long as users keep sending in coins.
There are a limited number of coins
And i don't think that many people are going to invest
(people have learned)
Well to be fair most coins won't be completely mined for a very long time, all the bitcoin won't be fully mined until 2140 iirc. Not saying any ponzi will last that long, but there are plenty of coins to go around. Some other coins have PoS too. Also some people actually have received payments, so just be patient and chill.