Just keep in mind that you will make profit without waiting for that long due to volatility of the price.
And if you want to save for a long time, learn not to regret when there's such sudden pump. In the duration of at least a year we can expect some sudden pump even at single time.
It is up to you whether you wanna save or use it....But as of now i feel like going to buy uᴉoɔʇᴉq is the best option and wait for some days then utilize it when the price is high. But if you try to save btc for the long time if incase as you told the price may go down as well.. so keep this is mind and play smartly.
Saving is the good thing to do but saving too long will be risky as if price falls in future then you won't be able to make money from it.