Life insurance can be an investment for third parties.
In the comments there is a discussion that the OP cannot buy insurance on random 60 year olds without an insurable interest. There is a legitimate path to end up holding insurance policies on third parties: viatical settlements. Historically, some lesser amount than the death benefit is offered to an insured individual with a terminal diagnosis, so that they can use part of the benefit while still alive, the finance company pays the remainder of the premiums and the finance company recoups the full benefit on death, presumably making a profit.
Original post can get there with a process change
This path is slightly indirect to the scenario as laid out in the original post, but presumably the OP can recruit a pool of 60 year olds, offer an agreed consideration for any who get underwritten policies for their participation in this, and take over the policies from day one.
Is it a good investment?
In the late 1980s, financiers thought they had a winner in using viatical settlements to buy life insurance policies from people who turned up with AIDS diagnoses.
Due to innovations in medicine, it turned out this is a particularly risky investment.