Bitcoin is good investment as it has proven to be in the past years of its existence and you have to know that it is very volatile so it is recommended that you invest on it for the long term because if for the short term and you always watch the movement of price, you may panic sell when it is going down. Many newbies did that in the previous month that sold their bitcoin investment because of the price that went down to as low as $3k when they bought it more than $4k thinking that they want to cut their loss only to find out a month after that it has reach a new all time high.
As for litecoin, I cannot give an opinion to that as I am only investing in bitcoin but many are heavily invested in litecoin too because many are expecting for it to rise in price in the months to come.