If you are just starting off, I think investing in altcoin is the best decision for you as of now since it is cheaper compared to bitcoin. Investing in altcoin is affordable. But you can also choose bitcoin because if we base on the history chart of it, its price significantly grew through the years. Bitcoin price is at all time high making it not suitable for buying for newbies but could be a great choice for veteran traders. I think bitcoin is king of all other currencies and there is no any other competitive of Bitcoin so I prefer bitcoin every time and any condition because it is good for long term it will change your financial position.
I prefer to invest into btc. I've tried many different altcoins but it seem Bitcoin is the best for me. But always remember that you must not put all your money into one crypto. It also has the best chance of lasting a long time. Btc is the best for long term invest. One of the things that makes Bitcoin attractive as an investment is that there is a limited number of Bitcoins that can be mined. But there is also eth who will follow the btc. As we get closer to that limit, they are getting harder to acquire. We should start to invest into eth right now. As long as Bitcoin can survive, it seems that there is potential for it to make long term gains. So we can get profit while we can.