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

Nice. This is very realistic and true to every investors. When you already grow up your $1 to a good amount then you can buy bitcoin and invest in cryptocurrency.