TLDR; 60-70% of players go bankrupt or are under financial stress after they retire. Reasons are (1) they don't follow balanced mix of investments and squander money in opportunities presented by smooth talkers (2) they end up hiring people who are friends of other players as opposed to actual professionals to manage their assets (3) divorce.

The recommended mix of investments for 20+ million assets is apparently "5%to private equity, 7%-12% to real estate, 50%-65% to a mix of public securities(stocks, mutual funds and the like) and the rest to alternatives such as gold and hedge funds.".