1)Buy an apple for 1 dollar.
2)Then sell it for 2 dollars and buy 2 apples.
3)Repeat with 4, 8, 16, 32 apples and so on, until you managed to sell 3500 apples for 7000 usd.
4)Buy a bitcoin

simple on paper, sounds good- doesn't work?
eitherway, I think we are feeding a troll lol
If you only have a dollar, there's so much going on with the way you earn and save money that it doesn't even make sense to think about any kind of investment let alone the crypto route.
There's many "inspirational" stories on how a millionaire starts his/her business from nothing. None of which include the step of going to a forum and ask "what can I do with a dollar".