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.
The safest way is to invest Bitcoin at a lower price, not during Bullrun. Just hold and never trade.
We never think that everything will find just like today and it will continue to rise by tomorrow or in the next few days because that is not the truth. If you come into trading with less knowledge about this place, you often lose no matter how hard you try, and even you choose the best trading platform. We have to know that trading is risky, it is really easy to keep calm and never be emotional but you can't decline such feeling when you are in the real scenario.