I've seen over one dozen websites believing that BTC will skyrocket in the upcoming years.
The platform I use is Coinbase.
I'm thinking of just buying BTC-USD and just leaving it be.
Any thoughts on this strategy?
That's great if you have any thoughts of investing in Bitcoin. But if I were you, I would probably prefer to buy Bitcoin directly from DEX and keep it in my wallet rather than open a position in BTC pairs on Coinbase. You know that when you store Bitcoin directly in your wallet, you have full control over it and you can trade it any time you need. But it's up to you, I'm just giving advice.