So weekend trading is good for placing long positions?! And that can work, right? People can trade like that and make a profit if they do it properly! It's trading, after all, each of us can find the strategy that suits them! Of course, people who trade long positions only on weekends will miss this and that, but it does not matter, playing on safe can be less profitable, but at least it's not a loss!
IMO trading on weekends is as bad or risky as on any working days. Trading on weekend is suited for people who are in trading market for all the time. You cant just jump in the market on weekends and make profit.
I think in trading many things can work if you have a good approach, do your research, be patient, check your orders from time to time (on weekends)... and if it's profitable just continue with that! If not, change it!
Crypto trading works only on hit and trail basis. You need to lose something to learn this art. Though there are fundamentals like TA/FA and Charts, but what matters the most is your strategy and that only comes from your own knowledge and experience.