No one can certainly know the future, the reason why most of us have this regret of not buying before when the price of bitcoin and altcoins are still cheap. But it happened already, we are still fortunate that we're able to witness the growth of bitcoin and had the chance to gain during bullrun 2017 and this year.
Don't know about you guys but I feel pretty late. 
Its not late you can still engage yourself at anytime you want. Just fill your mind with knowledge to be prepared of what to expect.