My number 1 rule in Cryptocurrency for most Altcoins is that I only invest an amount I can afford to lose, if you have observed that rule you won't be asking this question.
I observed that Altcoins get listed at high price and also get pumped otherwise we won't be witnessing this level of decline in price, next time I'll advice you to observe the rule.
It is difficult to tell you what to do at this point because Braintrust has declined so much and I don't know what price you bought it, if you have about 50% of your investment left you can sell.