Bİtcoin is highly potential coin of all the time as I see it. Plus I believe investing in Bitcoin has least risk. My opinion is in couple of years bitcoin price will be three times more from today. It is just question of time.

On the other hand alts have high risk potential. They are extremely unstable and dependent on Bitcoin moves. Though if you are lucky to choose and purchase the right one and hit the strike it can be extremely profitable.

I suppose it is worth to risk sometimes. But invest as much money as you can afford losing. TO my mind it is better not investing all your funds to  alts, dividing is my strategy.