So my question is: Is there such thing like low risks strategies? If yes, what could be an example of that?
Yes there is, as long you believe on it and you know what you're doing, then it can lower the risk.
Safe strategy is to play long term with the good projects for example on Binance, you'll buy at the bottom price and you wait for its to recover this may not be the safest strategy, but as long as your money is on a good project there's still an assurance that you can make profit.