Hi im trading altcoins on exchanges for years now and i was always withdrawing like 60-70 percent of my profit
and buy bitcoin for the rest (30-40 percent) but since btc price is highly increased you think i should just keep
doing the same or i should buy USDT instead with that 30-40 percent meant for bitcoin and store it in a safe wallet
like trezor till btc price drop or till we see a new bear market then buy btc with that saved USDT

btc is now quite high,
if I were you, maybe I would take a safe or conservative step by buying btc when the price corrects
so for the time being maybe I will put it in usdt or in other crypto then do small trades there, when btc has reached the correction price then I will start trading in bitcoin again
Buying now is good and take off the mindset of trading bitcoin and try as much as possible to hodl Bitcoin for long you should also try as much as possible to avoid shitcoins or you can as well invest just 10% of your income into shitcoins so you won't loss much when it finally crash down, the best way to approach bitcoin investment is to accumulate Bitcoin and hodl for long from period of 4-10 years or more instead of waiting for bitcoin to drop in price be buying which is called buying the dip method this method will delay your Bitcoin accumulation journey meanwhile with the DCA strategy you can start accumulating Bitcoin small small as long as your discretionary income is available as you can be buying either weekly or monthly irrespective of bitcoin price and hodl instead of waiting for the price to drop first before buying, what if bitcoin price failed to drop it means you won't actually be accumulating right? If your answer is yes then you are wrong.