Lost $20K in after tax brokerage account, should I invested?

[Ling Lin]

Hello! Currently I am at a lost of $20k in my after tax brokerage account with remaining of $40k in the account all invested in tech stocks like Tesla, CLNE, SPCE etc. I purchased majority of them last year Feb-March time so they are currently sitting at 60-88% lost. 
I am active duty military deployed so I entire yr income are tax free so I basically “don’t have any income to report”. 
Should I take the lost and reinvest in total stock market? Or should I hold?