Does Bitcoin actually have a Dip season? Or just when you are capable to purchase that comes the investor Dip time?
Anyways, let me just say buying at the Dip and holding is the best format to purchase your Bitcoin and accumulate as much as you can while the markets erupts to be appreciated in values.
While we alternates to diversify our investment to the altcoins, I don't think if there would be confidence of reliability to buy and hold for such a long term while aiming for increments in the market value. Believe it, altcoins cans be funny.
Is very wrong to choose Altcoins as a method of diversification because is not safe concerning the risk involved, however if I may ask why would you choose Altcoins as an alternative? Or is it the possible profits you feel you could realize from it?, actually the moment earlier you remove Altcoins as an alternative the better for you, however one thing you most understand about Bitcoin is that holding is the only way to see more tangible returns in the future, however it seems that you don't really understand much about the potential of Bitcoin because if you do you wouldn't have