exit plan help and wallet recommendations

Im buying btc and i want to sell when its bullish in the next couple years, i want to convert to usdt and wait until the next bear, then pass the usdt to btc again.

Is this considered a sort of exit plan? Its not totally exit but eventually i will like to cash out and perhaps use the funds to buy some land and make my own house or down payment.

Also i am currently holding my coins at binance (yeah dont need to tell me) i just need to educate myself properly before doing something, i dont wanna mess it up and lose it all, as today i feel its safer in binance because of this reason.

I want to make my own wallet from a site, save the credentials on a laptop running tails without any internet connection, perhaps keeping a metal backup (may go to 2 different blacksmiths or metal workers and make half with each) Does this make any sense? I been fooling around with bitcoin quite a lot but i am pretty paranoid and heard many stories of people loosing their wallets