it is Bitcoin we are talking about here and I find it problematic and it doesn't seem to be a normal thing to sell in order to buy back, surely you might buy back at a price higher than your selling point, but yeah any one can do whatever they like, the truth must be told that Bitcoin is best performed when view on a long term which is better than chasing a few dollars profits over short term price fluctuations, everyone have what Bitcoin really mean to then. Buying and holding for longer period of time is the best where you will experience compounded value of your investment over time.
Actually, the strategy above is optional as an alternative to getting higher income than holding the same amount of assets, although this strategy is not recommended because we don't know if the market price will move higher than before, but on the other hand, you will get the profit if you can carry out the strategy optimally if the movement the market price is in line with the planning target, the "make a profit and buyback" strategy is actually very vulnerable so you can carry out this action using half your assets to avoid the risk if the market price continues to increase after you sell your assets.