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Since I was having a good time doing this and see also that I was profiting, I haven't to think of another strategy to earn more, I was contented enough.
If this strategy works for you that is of course very good, I fell on my face a lot with it in the last bull run (2017 - 2018). When I then also became aware of what I now still have to pay in taxes for my trades was then again a shock for me ...

Since then, I have completely withdrawn at least from day trading, I have unfortunately absolutely no talent for it - and certainly not the time and nerves. My strategy is therefore: hodl & stake, which of course works very well in a bull run. The biggest problem is now finding the exit point at the end of this bull market.