there is nothing too late engaging on btc investment as long as you have the guts to take risk of either havinf profit of thousand bucks or losing. Well btc price now might be too huge compare when its just starting but who knows it may multiply hundred folds more.
I agree with you mate, It depends how how are you gonna risk your investment and the guts to face the price movements this will drive you crazy but as the saying goes if you can't handle my -20% you do not deserve my 800% you also need to trust in the market as always.