Many, but not all, doctors make high incomes. Most doctors are not wealthy. This blog post at Liberated Doc discusses why having successful medical practice often does not translate into the conversion of income to wealth:
the limited or complete lack of equity that physicians have an opportunity to build is a major shortcoming of clinical practice....
The money left after direct expenses are paid and that is left for the partners is equal to what it would cost to hire other doctors to do the work in place of the partners. In other words, the partners often don’t make much more than if they were just receiving a salary as an employee.
The days when doctors could hope to fund retirement by selling a medical practice are long over.
Personally, I'm hoping that my investment in junk bonds (within retirement accounts, primarily a Vanguard SIMPLE IRA) will pay off. I started gradually investing in high yield bond funds in Mid-December and have done well so far. I have sold a portion of my holdings over the last several days and now plan to monitor market conditions for a few days before deciding whether to stay in junk bonds or switch back into a money market fund.