Do you have back up in case you lost your money in Forex trading?

At such times, where will the trader go and get money from to start trading again assuming that everything was lost. So I'm thinking that we should have a kind of external business maybe offline as a backup to run to at such times.

Do you think this idea is good for a forex trader, should a trader have a backup in the form of another business?

I would not suggest you to take trading as a full time business. Instead, you should have your own job or business. So, when you lost, you will not losing everything. Plus, you should educate yourself how to trade, and practice with demo account before start trading. If not, you are treating trading as another gambling machine.