There are times that I would leave my capital on the same crypto and I would just take the profit to invest it on other alt-coin or cash out, there are also instances when I would sell off all the crypto on my portfolio, and hold it in USDT to wait for the market to go down then choose which alts would I invest in.
This is an effective tactic because if the coin has potential then we will no longer be able to get the initial low buying price unless a hard correction in BTC occurs. By taking a little profit and diverting it to other cheap coins, it will increase the opportunity to increase our investment estimates, meaning there will be additional new coins in our portfolio.
The most interesting thing is, you don't go all in and save USDT reserve funds in your account. It's good enough to be adopted.