To invest in the medium or long term, do it with shares of established companies, because they pay dividends. For trading, ALWAYS set a stop loss, no more than 1.5-2% drop.

Take this advice from me: Don't sell your currencies no matter how much you're losing, even if your losses are half of your capital in spot trading. This market has investors with billions who only profit when the market drops, acquiring your currencies so the market can rise and they sell at a high price. That's the story of the market because currencies are limited and specific in number. Don't be afraid and hold on to your currencies; your currencies won't drop to zero. This is a technological market that won't end. Just focus on the currencies that have projects and a name, and don't think about the current loss because it's just a matter of time and it will rise after hours, days, or weeks. The loss will turn into profit if you hold on to your currencies and don't sell at a loss. Don't sell your currencies at a loss.