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You can buy fractions of a bitcoin. For example, if you buy half of a bitcoin, that would be roughly $2,050. Yes, bitcoin is worth 4100 as i type this. In one wallet, i have $66 worth os bitcoin. That's .0158 of a bitcoin. I use Coinbase. It's really easy to use. I just drop a 20 here and there when bitcoin's value drops. Xrp is like 20 cents, litecoin is at $53 right now. You have options my friend. Stay curious