You don't need to live in the doubts that Bitcoin and Ethereum are not good investments. You can't even imagine that they are still on the top because the people are trusting it and risking their money as they know that they can't be disappointed in the future.
No man, though there are no projects that keep on coming this will never affect the trust issue that people had to give them both. They are proven for many years and that was enough to tell that they are more than good for investment.