bitcoin is bigger currency then others as it is oldest. and future of bitcoin is very shiny no doubt. but other crypto currencies also getting peoples attentions.. and getting popular as like bitcoin. and bitcoin is more strong because of the other currency. they are support and helping each others.
In value bitcoin might be a bigger currency, but its not the oldest currency. When compared to most of the other currencies in the world bitcoin is so young. I think in future bitcoin might known to most users.
Bitcoin is gaining popularity at a moment and it will much higher at time progresses, So I don't think there is anything to worry regarding the future of bitcoin.
Bitcoin is getting more popularity these days. This is expected to grab the attention of most people who were in search of something innovative and interesting for their daily transactions.