Can you please elaborate further on whom you are referring to as these 'people'? Again, without any sufficient information and valid basis for this claim, this should not be taken seriously.

Bitcoin, the leading and reigning currency, will remain in its top position until another cryptocurrency will be able to defeat the number of sales in the market. In addition, even if there are other cryptocurrencies which are relatively 'better' in terms of convenience, if people would not purchase that coin, then its value will not/never increase.

What determines the price of bitcoin is the amount of people willing to purchase it at such price.