This is a naive idea, out of my element.

Bear with me for a while. You can buy cryptos from your home, using the PC. Cryptos are sold in many exchanges. They don't have necessarily the same price for the same assets. Their prices are updated throughout the market, but it takes a short while for that to happen.

First you distribute some money along the exchanges you've noticed to take the longest to update. 

Then you take advantage of the difference of price, buy where is cheap and sell where is expensive. 

In the end, you should have more than what you placed at start. 

Notice: Please don't sell your house to do this. I don't even know if this works. Always make sound investiments.