My advice would be for him or her to invest their pension money in Bitcoin instead of using it to invest in other businesses in the country because of the state of how investment is in the country are poor. Bitcoin gives him a higher chance of making better return so he doesn't need to be scared or worried about all the negatives comments Bitcoin is recieving. The growth of Bitcoin so far should be a valid reason why Bitcoin should be the best place for them to invest, this will be my only words and it's left for them to decide.
What about those not receiving pension?
First directive is about the source of income, and financial hold of the individual. We are both in a country were we've seen people depending on pension to survive, also those who uses pension to start up or restructure business.
With two set of individuals, the first person can't take from pension to invest in Bitcoin, there needs to be establishment to cover up needs and household expenditures for the time before whatever was investment begins to make reasonable profits.
Any 70 years old, investing in Bitcoin should have their wallet backed up properly and also place it under inheritance.