Mate, first of all, you should try to achieve some good knowledge of trading then you can start your trading business with long-term trading because as a newbie short-term trading will be hard to make profits for you. So I recommend you for doing long-term trading.
Exactly before thinking of whether long term is suitable or short term, better to have a strong look over what you are up to with knowledge. Learn first, grip more concepts and then jump to next step.
Both short term and long term can make you a profitable trader but there are a lot of things to consider, the most important is the amount of capital and the time you are willing to spend. Everything can be positively done through a proper timing but since the market is getting more unpredictable, the more we should be smarter in order to meet our goal.
the market is always unpredictable not just today or these days but ever since the beginning of cryptos and like have you said , we need to be more smarter when deciding when to sell of buy . better to check the news and the latest threads about trading so that we can also get an idea if the price will fall or go high .
in the meanwhile , trading short term and trading in a longer term are both profitable and good to do rather than choosing only one path because you can possibly maximize your potential profit