This means 30$ spent on Bitcoin every week. Here goes my beer cash.
It's up to you. OP is asking is 1BTC a good long term investment, I say yes it's a great investment. But I'm investing much more than only 1 coin. I don't consume alcohol, so I can save more coins.
If you want to save 30$ coins every week, that's great for both your investment plan and your health.