It's bitcoins. Only a very small percentage of altcoins that does have a real project for the future and the rest are worthless.
Most of the people are afraid of bitcoin in these days because the price is very variable, and it is due to some decisions which damage the value of bitcoin in the market. That’s why the price of one bitcoin feels down to almost 2900 from 2700 dollars, but it regains its position in the market and the price once again reached more than 4000 dollars. There is lot of currencies in the world but bitcoin is the best.
Well, if we talk about the long term, Bitcoin is still a best choice, bitcoin has proven this in recent years, the price of bitcoin is always increasing and increasing every year, investing in bitcoin is still a wise idea at the moment. However, if we own too little bitcoin, we do not get too much profit in the long run, so we should optimize profits by investing in altcoin, and I encourage us to invest in the potential altcoin, altcoin must have many plans for the future, there is a large community with many supporters, at present the market trend is changing, we need to recognize this trend, if not, we will have more trouble in investing altcoin