You should tell him that your friend Satoshi just gave you a tip ... BTC is going to double in the next month so he should buy big.
If he asks any questions, just have him Google Satoshi
If he really buys big, he might drive the price of BTC up (and all cryptos follow). If it doesn't go big, then you just need to correct yourself ... not this month, next month ... silly me.
Lol, I think the nicest but he ever did was 5p pounds! I have the feeling it might not side the market any. Lol!!