They said a broad market index was safe like VTI – Down 12%

I mean wtf guys? I was advised to buy VTI last year so i invested a 100k lump sum in December 2021. What i'm missing? With all what is going with inflation and the russia-ukraine war i'm down nearly 12% from all time highs and i'm fearing that it will get even worse. Should i sell now? Should i hold? I dont see anything more safe than VTI except probably cash but not sure…

What should i do??

Thanks