I had previously doubted that Bitcoin would be replaced by another currency. But my mind has changed. Because I see there are many other cryptocurrencies that the developers are trying hard to solve the problems in cryptocurrencies. What about bitcoin? We don't know who are the developers and no effort is being made to develop it.
If you don't try hard, your rivals will win. Bitcoin's rivals will win too.
Seems like a very strange statement. I guess just a FUD topic. Since we do know who the developers are. And we do know they are putting in a lot of effort to advance bitcoin. I do think there is a bottleneck on expert blockchain developers who are working on Bitcoin, as there are now so many ICO'd companies who got a bunch of money to hire developers so it is pretty natural for people in Blockchain to go to a blockchain company for their full time work rather than simply volunteer to work for free on Bitcoin's open source software. Then again, companies come and go, Bitcoin will persist. Development is slower, partially due to the fact that they can't just break Bitcoin freely like altcoins and Bitcoin forks do, since its governance is decentralized unlike most of the other ones and so much money is in it. But when the companies behind all those altcoins and tokens and forks blow their money on developers and parties and their coin or application isn't adopted like they'd hoped (will happen to >90% of them) they will disappear and Bitcoin will still be plugging away on becoming the global payment network and store of value.