I don't think government can do much in the crypto world. They could ban it, lay some rules and constraints on it, but can't control it.
Because people love the cryptocurrencies and We The people make government. And what we like will be the thing that even government has to follow.
That's a great piece of advice to not to hold all of our investments in a single coin, like there is a saying, "Don't keep all your eggs in a single Basket".
The more we explore the crypto world, the better coins we found everyday, and the more we believe in them.
Will the Bitcoin and Ethereum will always be on the top?
Well It's like asking Will the US dollar or the gold will be at the top or most wanted. We have seen recently that bitcoin has outdated gold.
Bitcoin was found on the belief that there is a flaw in fiat money and transactions throughout the world. Some day bitcoin might be flawed and people will adopt the new coin more and more but till then, It is the "king of Crypto World".