now only the price is little high , i think the value of the coin in future days may reach so high so that it would become so expensive to buy it
because now the people in the world started learning about bitcoin may it become popular
If the trend is going to be like 2017 then yes, there is going to be situations like only whales can offord buying huge bitcoins. I believe all who are earning bitcoin now, will have enough amount to buy and sell bitcoins. The circulation should be high when the price are so high and obviously the trade volume would be high as well. Hope to see such situation. If this situation happens then, other altcoins value would certainly increase as well.
May be the price reach to that level in the future, but I think it will not be good for bitcoin overall because the demand for bitcoin will down which may cause low price again. In my opinion the price should be in limit for everyone, so that average people also able to put their money in bitcoin and make some money in the future. Too high price is not good for bitcoin at all.