Selling your bike and buying bitcoin can't really guarantee you making any profit over a short period of time, but there are chances of getting some profit in a few years, of course, I'm predicting you're not restricting your life by selling your bike just to buy bitcoin. I think your bike is a necessity for your life because you need it for your daily life. It's hard to throw away some need to just invest in risky stuff even though there's a high likelihood of earning profit later.