Day trading isn't as simple as just buying low and selling high, it just doesn't work much with altcoins in my experience you got to do it in BTC/USDT. If you take a look at the SNTR today, its almost worthless coin where you can't even see updates that can make the coin spike a bit to attract traders but with BTC the price can just swing in everyday where your chances of earning is much larger.
Currently the price of SNTR is $ 0.000001, the value is very cheap, why does the OP keep SNTR coins for so long when this coin has no potential, only 2 exchanges have SNTR volume.
I agree with you that it's better to trade daily with BTC / USD or BTC / ETH with great opportunities and you can play with your strategy.
Yeah I agree with you for daily trading BTC/USDT or BTC/eth really works. You can either buy long or short it means you don't depend on the scenario of making the coin going high since you can bet into low direction. It only depends on how your charting and marking analysis run.