Your friend is too optimistic. You should already be at a loss. The future of cryptocurrencies will continue to decline. The cryptocurrency will only rise when a lot of confidence is lost. This is a cruel financial market and we must be careful.
I understand you're making your point out of a loss incurred during this bearish market. However, this does not guarantee your point that the market will continue to decline. Check the market prices now and you will see there is an improvement after sustaining the terrible drop. Cryptocurrency has faced similar and worst moments than this in the past yet there was a bull market in December, 2017. Let's be patient.