To be honest theres no strategy that works the second time. It all depends on markets nature. If you follow up a specific trading pattern for multiple times, then definitely you will end of making losses. Rather you should always analyse the market and observe the curves of the coin. Once you feel confident take calculate risk and trade. In this way there are more chances that you make good profit and dont lose more often.
In theory I think your suggestion is really good, but in practice I don't see it at all easy.
The strategy must be adapted to market conditions because we will not be able to expect profit targets to be achieved in every cycle because the market is very unstable. If previously I wanted to TP at a 10% increase since buy, then maybe in the second cycle I should TP with a lower percentage.
After all, market trends are very volatile and traders tend to not always be profitable so greed is never a good thing. Day traders may be more risky, which is why sometimes others prefer investing over trading.