Sure, well if you lose cash stored under your mattress in a house fire, or you leave a bag of money unattended on a sidewalk...or you do anything careless with

Sure, well if you lose cash stored under your mattress in a house fire, or you leave a bag of money unattended on a sidewalk...or you do anything careless with things of value, you can and will lose those things of value. Bitcoin transactions take 10 minutes. That is a fully settled transaction in 10 minutes. When you Venmo somebody, it doesn't get fully settled until they actually withdraw to their account, which is at least a day.