Some points mentioned here like the high level of scam associated to crypto and other factors like not able to trace and retrieve funds when lost are truly retarding crypto from mass adoption. Other vital issues are scalability issues, issue of hacks and meeting up with regulations. We have a long way to go before mass adoption can be met.
Yes there are some practical problems which can be avoided by with proper training and education which is what we are trying to achieve and there are other core fundamental problems like you mentioned we believe these will be resolved with time too, as more and more people puts their minds together to tackle these issues one way or another there will be a solution.