Making billions from 40k$ very difficult. Not impossible but not possible with bitcoin, in my opinion cause Bitcoin already increased a lot and i dont think it could still grow more thand thousands time, to make you billionaire. Besides betting whole fund on meme coins, will proof your poor mindset. Rather eth, matic are good to go. No guarantee for billionaire but good return in long term.
Bitcoin can make a lot of people rich, you know that bitcoin's existence, sustainability and main nature is to increase over time. Not only does bitcoin create one-time opportunities where you can buy and hold it as part of a $40k investment process, bitcoin doesn't make you rich quick, it boosts your awareness of yourself. and education about financial management. from there you have more opportunities to get rich.