You may sell your BTC during the bullish period of, which may be a sign of good business. Now you bought again at the time of low market, here you stayed with Bitcoin and increased the profit margin.
I disagree with this strategy because it is for those who are in bitcoin for short-term profit. Secondly, this strategy will make you miss out on bitcoin if you sell it for short-term profit because you will have a price where you would like to buy back your bitcoin, and if bitcoin fails to dip to that price, you can't buy back your bitcoin. You have to change your mindset to long-term holding on bitcoin because it is through holding that you can get the real profit.