Some comments about your post.
  • Binance is not the only place for buying. You need to learn about Robosats, LnP2Pbot, Bisq, Mostro and HodlHodl.
  • Do not worry about your profit on FIAT term, just try to focus on stacking more sats.
  • Trying to time the market and sell your SATS when the price is high and buy again when the price is low is very hard, most people end up doing the opposite, buying high and selling low. IMO, the best option to save in bitcoin is to do DCA, just buy every week or month and try to not look the price, just buy & hold for a cycle ( 4 years at least), then, decide if you want to get out some cash to buy X item or just wait longer to buy a bigger asset...
  • Long term is the key.
So, just buy & hold.