Bought 0.3 bitcoin 4 months ago(when it was 10k$) but lost it all via gambling...
it was supposed to be for long term savings but i fucked up

I feel sprry to hear about that, dude.That's heartbreaking and I'm sure that you really regret it especially now that the price of BTC strikes too high. Just move on and take it as a lesson.
Mine was when I have spent my BTC during the lockdown. I have lost my job because of the pandemic so I don't have any choice but to use it for our daily living. I don't have enough holdings during the ATH because of what happened.