Cryptocurrency or crypto as it is often called is digital currency. Like stocks and investing is can build great wealth or cause massive losses if you buy or sell at the wrong times or do not keep track of it. Unlike the real stock market, which closes at 4pm EST with trades not really able to be made after this time, Crypto is live and trading 24/7/365 as it is a global marketplace.
Many people are weary of crypto because of it's beginnings, fraud and other issues that might take place, though that can also be true in any business venture so it is always recommended to do your own due diligence in researching companies as well as specific crypto currencies that you may be interested in investing in. Keep in mind you should only ever invest what you are willing and able to lose. Again as a disclaimer you can lose money in crypto and I am not a trained or certified accountant, tax person, lawyer or investor and I make no claims you will make anything from the recommendations on this post.