I started investing in crypto about a year ago, and I can say it is quite profitable if you have a disciplined method of approach. It shouldn't be a short term pump and dump approach, as that is more like gambling than investing. A YouTuber called bitesizebitcoin has a good approach that I myself recommend following (as it is similar to what I have been doing before finding him).
Things like; waiting to buy, wanting to buy a whole bitcoin, wanting to sell at first sign of low or high, approaching it as a way to make a living as opposed to it being a supplemental investment for extra money, spending money you need as opposed to money you can risk, and not doing your research before investing, are all things that will kill your investment and profitability. Also, think HARD about security and where you will keep your currency, as it is a lot more complicated than using some investment banking service.