Day trading & gambling do have similar features. Short term investing in blockchain does trump both of the latter I believe.
Indeed I will agree with you on this because short term trading is way risky as same as gambling and believe me I have had a taste of both and the results that yeilded from both field are the particular ones am not too proud of and I wouldn't ever advice anyone who is not an expert in trading to ever even venture into it. It's more preferable to just buy little coins and save and hope for the market to boom once more
You can't really blame trading for the mistakes you've made yourself, it's you who wasn't knowledgeable or experienced about the market and couldn't handle the trades very well which is probably why you had to face losses, and I'm pretty sure that you gave up after a single loss which is why you say that gambling and trading are similar which is not true. Even if you are making short-term trades, you can still manage to gain significant profits over time.
Gambling is totally dependent on your luck while trading requires knowledge and experience, and it isn't necessary for someone to have all their trades ending with profit, you will face losses as well but it is not like gambling where your losses will surely be more than your wins in the long run.