This sounds very optimistic and probably reflects the VC view more than reality. If 15% of current AI startups are succeeding 3 years from now (granted not the same as "in business", but meaning roughly they survived to another funding round) investors will have done very well. I'd invest in a portfolio I thought had that kind of upside. Personally I think it will be way lower.
How many web3 startups will still exist next year?