"Soon" would be in the next 1-3 years or so.
One of the biggest dangers for BTC is something more useful coming along and investors switching - a process which could happen extremely fast, once started.
So to all the tech savy people in here - what advantages could other cryptocurrencies bring that will give them a crucial edge over BTC, and how fast could something like that come along?
according to my observations bitcoin has a system that is good enough, and many people believe it, but the technology of ethereum is far better than bitcoin, if one day cryptocurrency is legal in the world, I am sure many people will choose eth, because eth has things that better, so I think bitcoin needs to make major improvements so that it doesn't happen.