That means there are only 4 types of people who should stay away from Bitcoin. If it had to be the order of most must & least must, then it should be:
1. People who lack knowledge & understanding.
2. People who are in bad financial condition.
3. People who cannot afford the potential for loss.
4. People looking for short term profits.
Outside of these four categories, there are some people who are afraid to invest in Bitcoin. Those who have businesses and who trust paper money but not virtual currency. Those who have suffered large losses investing in Bitcoin will be afraid to invest in Bitcoin a second time. Those who are heavily influenced by the anti-Bitcoin sentiment around them will be afraid to invest in Bitcoin.