when we decide to invest it means, we are ready for any consequences that might happen later and if something bad happens, we don't have to regrets and we need to search another way so we can still make a profit. so before we invest, we need to know everything about the program investments so we can know that every investment has the risk. besides that, don't put all of your money in one investment only, it is better to spread in many investments and if you decide to invest in cryptocurrency, you need to diversify in many coins so you can have a chance to make a profit from the investment.
Feeling regret for getting something that beyond our expectation is normal. As long as we can immediately forget it and start to take wiser actions so that in the future we can minimize losses, it will be okey. Regret is a humane thing btw.