First things first, you should not ask for financial advice on the internet.
Meet some professional financial advisors in real life who know about Bitcoin.
What if he wants privacy? Some people only bought bitcoin on low-key and avoid people in their environment to know about it because of the possible physical attack that it can cause.
There is nothing bad about online advice. I do not think there is anything good that the advisors can tell him than to DCA little amount at this time and laid wait for the bear market.