Ether has a market cap of $450 billion, and that doesn't count all the other tokens running on the Ethereum blockchain. It's been running since 2013. If you call that a "boutique coin" based on "pump-and-dump" then clearly you've either got a highly biased or highly ignorant view of cryptocurrency.
If that's not obsolete, I'm not holding my breath on Bitcoin.
There are technical flaws in Bitcoin that could literally crash it if they aren't patched out before they become exploitable, as in it's at zero value and will never recover. That's not something that can happen to gold.
No, it's not. Ether is not a governance token, Ether holders have no influence over the rules of the blockchain. This is a very common misconception and I can understand why it's easy to fall into, but consider it this way; when someone puts up a stake they are not buying "influence" over the blockchain, they are giving the blockchain a hostage. They're putting their money under the control of a contract that will destroy their money if they do anything that contravenes the rules of the blockchain.
So who gets to decide what rules the blockchain runs under? Everyone who uses it. They're the ones who are generating transactions, and those transactions are cryptographically signed to work on the particular version of the blockchain that they want to use. If they collectively decide to switch to a different version of the blockchain then they collectively change what version of the blockchain their transactions are going to. If the stakers don't go along with that transition then they're left holding Ether on a blockchain that nobody is using, which means that Ether is valueless.
This isn't hypothetical. Ethereum undergoes routine hard forks to upgrade the network, adding new features. Proof-of-stake itself was one such upgrade. There have been subsequent upgrades that did things to the network that the stakers probably weren't happy with - notably the one that added EIP-1559, a change that causes transaction fees to be burned rather than giving them to the stakers. It was a change that literally took money out of the hands of the stakers. But they went along with it because they had to. They were not in charge.
How easily can you get into Bitcoin mining right now? Regular computer hardware doesn't cut it, hasn't cut it for a long time. You need a purpose-built ASIC, a piece of specialist hardware that is only manufactured by a handful of computer hardware companies. You'll also need extremely cheap electricity, which you won't be getting out of the wall of your house. You'll need an industrial power feed, probably located somewhere near a power plant with excess capacity where you can get it particularly cheap.
If you want to set up a solo Ethereum validator, all you need to do is buy ~$120,000 worth of Ether and make a transaction to stake it. You can do that anywhere. No special hardware is needed, no ongoing significant power cost. You do need a reasonably stable internet connection, but it doesn't have to be a high-speed one. You could probably do it from a cabin in the woods over Starlink. Nobody can stop you. Nobody will even know who you are.
If $120,000 is a bit much for you (it's still far less than would be required for a Bitcoin mining farm) and you don't mind a little bit of reliance on third parties, you could buy some liquid staking tokens. Spend as little as you want, they subdivide. Or wait a little while, Ethereum's devs are mulling a proposal to reduce the minimum stake from 32 Ether to 1 Ether. That'll reduce the price for setting up a solo validator to $3,683 at today's price.