According to my experience is that if you invest your $$ in crypto so must read project if project are strong there roadmap are great so invest and wait for project success if you can't read about project and blind invest definitely you got loss so be careful strong and invest in real project.
If you invest 5$ you will not earn a lot of money. If you are not sure it is better to invest only in Bitcoin and Ethereum and now it is a good time for it. Now there is a fall of the marekt and after the fall of the market will be a rise of the market. And you will earn your profit in all the cases because Bitcoin and Ethereum will survive in all conditions.