I have never met a newbie yet that was unwilling or unable to self-custody with the right support around him or that lost anything while doing it.
I have. Or at the very least, Newbies who are willing to learn self custody until they find out there is an easy way out, which is Exchanges and Custodial Wallets. It is very hard to make someone move from the comfort of Banking to storing Bitcoin at their own risk.
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Regards,
PrivacyG