Yes, it is always a better ideal when you purchase your Bitcoin at dip price, because that seriously help to allow you make a really profit compare to a person that buy when the Bitcoin price is pumping, So it better for you do your own research before you enter the market. and long-term holding  idea is always the best strategy because once you can able to hodl your Bitcoin at list 2 to 3 years, I believe you will likely to experience halving year period which is  where everybody believe bullrun will commonly occurs, according to history of Bitcoin and that have repeated itself in many times. Buy dip and hodl for a long term so you can able to make huge profit.