Guys, i lost half btc in some circumstance and rest of my altcoin in also down position so in that moment what should i do?
give me your suggestion.
You need to assess your perspective of the market.
If you think the market will recover from this current price, then hold.
If you think the market will still fall another 50+%, then sell. Accepting the loss is the hardest part.
You can always buy back if the market falls further.