It is never too late to buy bitcoin nowadays. Actually, now is a good time to buy bitcoin because of the dip and it still hasn't gone up so investing now is definitely a smart move and a good time to start to invest of it. Don't let anyone convince you that it's too late to buy bitcoin and invest, it's never too late as ling as you have the guts to riak everything as long as you wanted to be.
I agree to this, it is still not late to invest in bitcoins. People are making huge amount of money by investing in bitcoins. When it was launched, it was available for few cents each. In Dec 2017, the price rose to about $20000. People who invested in Bitcoins in early stage became millionaires. No other form of investment can give this much of returns.
With current price levels, only requirement from the investor is that he should remain patient with the investment.