NEO is growing at incredible speed. This growth is being driven by the value of the gadget and its reputation. The ability for NEO to gain support from the Chinese government and play a more active role in the Chinese economy is also a strong point. If this happens, NEO can grow faster than people expect.
However, Bitcoin will not give up the top spot easily. Bitcoin has the advantage of being the first encoded currency and has a large market share in the pre-coding market. Bitcoin has a good global brand and has become synonymous with the term "blockchain technology". Moreover, there are many Bitcoin ATMs operating in different countries. This helped Bitcoin hold the position pretty solid.
Despite this, NEO is still growing steadily and there is a strong support wave, which is a pretty tough battle for Bitcoin. However, with this rapid growth, it may soon take away the cash flow of other competitors such as Ethereum, Ripple and Bitcoin Cash. But in the end, the market will still be the deciding factor in how much the price can rise.