If the coin I am holding increase in value, I lock the profit I gain and convert it into a stable currency like usdt. When I piled up and reaches a desired amount, I convert to fiate and buy a bank investment
I believe in this thing that securing your profit is far more important thing to do than that of earning that profit. If you will not be able to utilize that profit at a better place, then there will be nothing good which you will be able to make us from that profit. It is better to invest that profit into any of the crypto currency again as this will increase the amount of money which are earning from that investment.
I think your last statement will not work 100% mate, how means suppose if you invest your profit in other altcoins and that coin price drops after you investing and it stable for a long time then you can't do anything you will lose your profit. better try to cash your profit instead of putting that money in other altcoins.
A decrease on the price of altcoins usually open an opportunity for investors to acquire more for short or long-term perspective. In general, cryptocurrencies have a high-volatile price, meaning it can be a double-edged sword when you acquire more but this depends upon your decision if you want to risk it. Typically, I treat market dumps as a gateway to acquire more but I have the burden of observing the market and researching to avoid any loss from incurring.
Well, whenever I have earned 50%, I will withdraw 25% of my profit. That is my way to secure my profit. And I will use that funds to invest in other places, such as gold, bitcoin or real estate which are more safer. You can follow my way if you want to.
My method involves not selling any of my coins lower to the price I acquired them. I diversify my investments and also acquire most of them whenever their price decreases in the market. Most of my coins are primarily for long-term investments but when it involves around ETH or BTC, I usually withdraw them around 2-4 weeks depending on the volatility on the price.