if you really believe him that an altcoin with lots of issues and with unlimited supply and the current circulating supply of over 100 million can reach $150,000 then you must think that bitcoin that is the only decentralized currency that is working perfectly fine and has limited supply with a circulating supply of 17 million must reach $100,000,000 ($100 million).

that my friend is simply impossible.
in fact they would be lucky if ETH is worth anything more than $20 within 5 years from now.