Day trading never works well, I’ve seen so many of that type come & go after getting REKT over the years.
Just HODL your bitcoin’s at least until the end of next year, I guarantee you’ll make far more $ doing that than trying to trade.
Day trading is also making some other traders good profit. These all depends on the pattern of the way you learn it. Day trading is for traders who enjoy being on the system and have the time to monitor the running trade to know the profit time. Hodling also is good but for a long time.
Day trading "never" works well is a bit stretch. Of course it could work well depending on the situation, there are tons of people who make their profit from day trading too, you could pick any few coins you want and you can master the prices of those coins and instead of trying to profit from ups and downs you could just focus on the spread and trying to make profit from that alone and still come out profitable.
However I can't say it is "always" profitable neither, it is not always profitable and you could end up losing money as well, you could get in with the hopes of getting out in minutes and it could crash so the price will be lower. So, there is nothing you can do to keep focusing on the one way or another, it could be profitable some times and it could be losing some other times, it always changes from situation to situation.