Although it is possible to mine coin with Raspberry Pi technically, but I am afraid at this moment this is not profitable at all. You can find detailed explanations regarding this topic here in this forum.

If government agencies and the banking agencies held 90% of the coins, it would have sunken already. There is no doubt about that. Most government agencies are trying to make their own form of cryptocurrency that allows intervention, as a result they do not want the traditional crytocurrencies to exist.

Emotion is not going to help at all. When doing investment anything can happen. If you fall for it, it will just destroy you. You just need to be smart and look forward.