what difference would it make, whether he heard about bitcoin yesterday or yesteryear?
you either have a good understanding of bitcoin or you don't
time is not really a factor as all the info you need is at your fingertips
doesn't work like that, majority of mining hash power would need to agree to this change,
not saying it could not happen, just look at UASF/SW2X etc.
but it would not be the decision of a single individual and could be suicide for BTC
(i do actually expect core to push something like this in near future as BTC cannot survive the incoming halvings)
"hacked" is just a term for "we stole your money"
also these "hacks" happen on exchanges,
this is not a blockchain being hacked or private keys being brute forced
but poor security apperently of the exchanges servers that store private keys
(this apparent problem can be easily avoided, which is why they are always inside jobs imo)