Every time I think I understand cryptocurrency I find there's more to it. It seems that anything in limited supply can have a value, even if it's not actually useful. There's definitely a lot of hype around cryptocurrencies that has driven some prices to crazy levels, and then they crash. I'm not a speculator/gambler, so I haven't invested in them. I just love the technology. The people behind it are really clever.

The issues I see with something with Bitcoin are:

• All that mining effort seems like a waste of electricity. It's become an industry now, but you can only make money where the power is cheap enough
• There's a limit to how much Bitcoin there can be, so mining cannot go on forever. I think it has to switch to transaction pricing then
• Can the blockchain keep growing forever? Won't it become unmanageable? Certainly not viable to download it to every device, but I expect there are ways around that
• Can the blockchain handle the traffic if it goes mainstream?

I understand the Steem blockchain is designed to handle more traffic, but if millions start posting blogs then it will grow really quickly. I know storage is cheap, but that's still an issue.

So many questions, so little time...