Fully agree. I have pointed out in the past the idiocy of people buying alts "because they are cheaper". A misconception I believe even Mr A advocated at one point. These alts are really more akin to scams in the way they were promoted. BTC is king, and the logical conclusion is that we will collectively agree on one digitately currency, which then provides an exponential gravitating effect.
You are forgetting one thing. Ethereum is now moving to Proof of Stake. Coinbase will be supporting staking of Ethereum. When you stake ETH you get paid back ETH in interest. It is like a savings account that offers decent interest rates. This many believe will drive up the price of ETH because people will have an incentive to hold on to their ETH.
Bitcoin is not the only player in town. It has first mover advantage but it would be naive to think it alone will remain and increase in value. There are way too many people who have a stake in other currencies.
I plan on converting some of my ETH to BTC when I am happy with the ratio. The current ratio favors Bitcoin but that might change. The key thing is to have patience and play the game long. If I am going to stake my ETH it may be locked in for years. I'd rather lose all my investments in crypto than sell early and see it go to the moon. That's a decision I have made for myself. I am willing to lose it all.
There are some benefits of proof-of-stake.
Less energy and monetary cost: for Bitcoin mining, miners need to spend around $50,000 per hour for electricity which means $1.2 million per day or $36 million per month. With proof-of-stake, you can cut all these costs out.
No need for special equipment: since you cut out all mining costs, there is no need for better equipment or ASICs (application-specific integrated circuit).
Stop 51% attacks: a 51% attack happens when a group of miners control over 50% of a blockchain’s hashing power, and use this power to mess with the blockchain. Proof-of-stake contributes 51% instead of this hypothetical group of miners, protecting the blockchain.
Avoid bad validators: every validator who has their own funds locked up in the blockchain would make sure that they are not adding any wrong blocks to the chain because that would mean their entire stake invested would be taken away from them.
Faster validation: all new blocks created by a validator will be validated faster.
Scalability: splitting the entire Ethereum network into multiple portions called ‘shards’. Each shard would contain its own independent state, meaning a unique set of account balances and smart contracts.
Even if the rules of proof-of-stake seem simplistic to implement, what differentiates Casper from the rest is that it incentivizes the honest miners and punishes the dishonest ones. If you have your stake on a malicious block, then your stake will be gone forever. It will punish anyone who doesn’t play by the rules.
https://support.bitkub.com/hc/en-us/articles/360030574932-What-are-the-advantages-of-Proof-Of-Stake-