Considering all of the other "crap" we are already spreading around via paper money/credit cards/etc., could COVID19 make tangible monetary exchanges obsolete?
No. The studies I've seen show that people gravitate toward cash when they don't trust the economy. Switching to alternate forms, in general, is a sign of optimism. Nobody is optimistic right now.
No. If that kind of crap starts we'll know the virus was contrived and purposely started. The rumor in Europe right now involves the CIA. I said rumor.