Most investors put nearly all of their wealth into bonds and stocks. Coming from a family of entrepreneurs and private equity investors, I never really understand the appeal of this approach.
Bonds are easy to rule out because they pay literally nothing and do not protect against the inflation. At most, they provide diversification benefits, but this diversification comes at a steep cost and it's mostly unnecessary for long-term oriented investors.
On the other, stocks are a bit trickier. Theoretically, they have generated good returns over long time periods. However, this is very theoretical.