Should I invest in bitcoin? Yes. Bitcoin as time goes by, continue to increase its demand. More and more people discover bitcoin. Infrastructures around bitcoin continue to increase too. More and more altcoins and companies uses bitcoin for payments for the promotion of their campaign. Should I wait? Yes. In order to get your maximum desired profit, you have to wait/monitor btc value from time to time. The fluctuation of value helps you buy bitcoin in a cheaper price.
No, you must invest more in altcoin, bitcoin unstable and can happen crash any time.
Neo is better
Investing in bitcoin is much profitable as it is because of bitcoin that other cryptos are in business. Bitcoin was the first crypto currency to hit the market. It has since made a sizable growth and has guaranteed high returns. Even now it is $16,434 per bitcoin. I suggest the best time to invest is when the price drops a little bit... Invest then. And sell as soon as it goes back up...