yea , the best thing to do when bitcoin are quite stable is by buying altcoin , for more safe i think buy popoular coin like STR , XRP , LTC etc
I agree. It is hard to stay in bitcoin because it is expensive unlike other altcoin that is more cheaper but some altcoin are worth because they are easy growing and can give good profit even for trading. You have to take opportunity on altcoin when bitcoin is unaffordable at the moment and gain profit from it to invest on others.
I also prefer good, authentic and reliable coins the ones you mentioned here. If you dont have enough money to invest in bitcoin then you should think about Altcoin investment, because there are thousands of coins in the market and you may be scammed by scammers while projecting new ICO. Never invest in any anonymous Altcoin.