Bitcoin for sure. I dont consider any of the other cryptocurrencies much of a contender in this regard. Bitcoin goes up even though some might think its not going to... They thought the same at 10k and 15k...
Feels really good when a new member on the forum says something like that! I cherish investing in altcoins but the faith shown in Bitcoins by new investors just melts my heart. I agree that the best option in long term is Bitcoins but as far as short term investments and profits are concerned, I have traded a lot of pairs in the past 6 months and I was able to make good profit with the dogecoin pump and even managed to save some XRP and sell them much higher than what most investors sold when the lawsuit against ripple created panic and price dropped, I actually bought some that time and sold them at a good rate.
Awesome opportunity to profit from cryptocurrency. And at the moment, my profit was made from these coins: Bitcoin, Ethereum, Litecoin. And I also continue to profit from these coins. I believe that cryptocurrency makes people successful because digital technology makes it possible to have a stable income. So the cryptoindustry is a tremendous opportunity to develop new digital business technologies.
Hey yeah, I also started saving some Litecoins myself because of the cheap and fast confirmations and also I am impressed by how Litecoin has done in the past few months.