The common mistake of people that are new to crypto is that they think the bitcoin price right now is too expensive already and they want to invest in the next bitcoin, there's a reason why bitcoin is expensive and in the long term the price right now is considered cheap, you don't have to buy a whole bitcoin. There's a lot of alts that claim to be the next bitcoin but most of them lose their value so I don't recommend putting your money in some random alts.