If you want to make a profit of X100, you have to invest when it was only a penny or starting of the project. It must also have a low supply because a huge supply is hard to make a 100X profit.
Wrong.
Total supply doesn't matter, it's all about the market cap. If the market cap goes 100x the price will go 100x. Simple as that.
Doesn't matter if total supply is 300 000 or 300000000000.