In the last bull market, I could hold a full position with a ten times leverage at a 0.3% fee every eight hours because the holding time was short! At the end of the bull market, it only took a month of rapid price increase to reach the peak.
Now, if you hold a full position with ten times leverage without closing it, you are being foolish. After six months of sideways movement, the fees will have eroded a large portion of your position before you even face liquidation.