Most people know the idea of the game is to buy low and sell high. What if you can't even buy low? In cases like these, you're best not to invest yet.
Make sure you have enough money for food or have some extra food put away first. You can't eat cryptocurrency. You're also better off to invest in some physical metals, i.e. metals you can hold in your hand like a silver coin before investing in cryptos. If you haven't heard about what's going on in Venezuela yet, they have a food shortage and 1 silver coin could buy you up to 3 months in food.
Also make sure you're prepared for an emergency before buying cryptos. Cryptos won't do you any good if you can't use them. Keep in mind everything on the internet or even everything on your computer could get erased at some point.
Only invest in cryptocurrency if you have the money and that money is money you can lose. Even if it's just $1, over time it can add up. Take care of the important things first and the lesser things will start to follow.