I think it is difficult and near impossible, when people talk cryptocurrency, then they will know bitcoin. I also know that there are many altcoin the technology side is better than bitcoin, but because bitcoin is first then it will not be replaced.
i think a time will come when bitcoin will be the first priority of the people to use, and not only for the online purpose but in real life also. if we analyse the bitcoin and other crypto currencies we can come to the conclusion that still bitcoin is the number one currency of the world, and hope that bitcoin will continue its status for ever.
Not number one currency in the world but, number one
cryptocurrency in the world
Right now, I can't see how it is a possibility. Every single altcoin depends on Bitcoin. But maybe in the future, after some upgrades, a new coin will rise and surpass Bitcoin. Maybe a rise-only coin that you can sell whenever you want? People would surely invest in a coin like that especially if it's rising exponentially.
Can you explain how every altcoin depends on Bitcoin? Because this is not true. Also a rise only coin, especially one with an exponentially rising, is not possible with the possibility of selling at anytime.
Saying every altcoin depends on bitcoin is not right I guess, but, majority of those altcoins use bitcoin as a currency of payment in their ICO or crowdfunding, therefore bitcoin have given a big effect to those altcoins and bitcoin will be always used if it's about cryptocurrency.