How to Invest in Bitcoin/Ether

This is a story about whether retail investors should invest in bitcoin/ether and, if so, how to make investments in this market. Here are my questions: 1. Is bitcoin/ethereum a good investment for retail investors? Is it too volatile? Is it comparable to investing in the dollar or foreign currencies? 2. Where are bitcoin/ether traded? How do you trade it? 3. Do you recommend bitcoin, ether or both? 4. What are some bitcoin/ether investments that you prefer and why? I am a freelancer.