Investing worth it?

I think it's a bit risky. Just because it's a scarce resource, it doesn't necessarily mean that it will always hold value, or tend to increase in value (unlike something like gold or land). Back in 2009, it might have seemed like a really cool technological innovation that decentralises currency and provides transparency to every transaction, but as it's become more widely used a lot of flaws in the technology have been made apparent. A few of what I'm aware of include:
1. Transactions now are taking longer and longer to parse due to how many calculations are required. You have to wait in a 'queue' for your transaction to be
2. The slow transaction completion times make it a very impractical to use as an actual currency.
3. The huge computational requirement to run Bitcoin, makes it waste a lot of electricity, which is bad for the environment, and makes it less sustainable as more of the world relies on electricity.

It's possible that Bitcoin might be superseded by a more technologically advanced cryptocurrency some time in the future, which manages to fix many of the current flaws of bitcoin. At that point, bitcoin would become obsolete, and I can't see the price continue to rise if the currency becomes obsolete.