Is it a error?

I just had 56000Bc but when i came to the game 1h later i have now 42000Bc please help i sold so much things to get this

You might have been hacked. Contact support@kukuori.com or go to the official pixelian discord server for help

i think if it was hacked then yhe hacker may have stolen everything

But your items/ bc will not be returned. Best you can do is bring justice to hacker