Investments schemes
Among other examples of fraudulent schemes, abusers might trick the elderly into investing in lousy and risky businesses. It might not be a bad thing for a senior to invest in something, but it depends on the agent to recommend trustworthy and safe deals.
Among the famous schemes, you should do your best to avoid is the Ponzi scheme. This scheme is fundamentally based on receiving money from new investors to pay the old ones. In the end, the money owed is more than the earned money, so this scheme is definitely bound to fail, leaving all its investors with empty pockets.