The best investment your pastor should invest right now should be on his children, 3 children , 3 investment so that the children can now invest in return for him in Bitcoin, or something else,for it is dangerous to put all his eggs in one basket, investing in Bitcoin at his retirement is too dangerous, setting up businesses for his 3 children will help him because the business is physically seen the strength of his invested business, unlike Bitcoin that is digital , which he might not be able to understand and he will keep on expecting high yield and instant cash.
Bitcoin investment is profitable and enjoyable for a long-term , introducing and starting with his children will give a better change of long-term investment because after teaching the children about Bitcoin and they have a better understanding about it,they tend to be more relaxed and comfortable unlike their father that will be faced with the fear of the unknown and uncertainty which can lead to untimely death, Bitcoin is not a Ponzi that gives you money within 8-12 hours please inform him, it is best for his children .

I think Bitcoin may not be able to fully meet its demand. The probability of Bitcoin's failure to meet its demand is high. Because We know Bitcoin is profitable in the long term but can be counterproductive in the short term. Bitcoin often continues to decline in value month after month. How will he handle the situation where investment is his only breadwinner? Will he be prepared for the loss then? Will it suit him?

I think you should convince him as much as possible so that he doesn't expect this from Bitcoin. If he is not willing to take the risk then suggest him to invest at his own risk where you will be his advisor only and you will not be responsible for any profit or loss. Because you should not cause harm to someone where there is a definite possibility of harm. Better advice for him would be to invest by fiat in a business that is most capable of meeting his needs.