.. the worm of greed is always digging in the back of my mind. Could I increase BTC if I sold BTC for some fiat or Tether before correction and add more BTC when the correction ends.
i have tried trading bitcoin but i never like the exchanges and the risk of them. however i always make sure to do this (meaning to sell on top and buy the correction) when i am almost certain about a correction on the way. for example when the price reached the $2900+ i was nearly certain that if it can't break the $3000 it will drop and it happened.
or when the bitfinex hack happened or lots of other big FUD, these have always been good points to sell some small number of coins to buy them back in a couple of days to hold more coins in the end. and it has worked good so far for me.
my suggestion is do the same as me and make sure to not do it with all your stash. just dedicate some small portion that you are willing to lose and trade with that. exchanges can run away at any moment!