@Kazu
Of course you can do as you wish. I am just trying to explain to you what effects I think "investing" in bitcoins is going to have as opposed to actively using it as a currency.
It makes very little sense to use a volitale currency as a form of investment currency for other investments.
You need to understand that anything that doesn't have a unit value of "1" can be an investment, and that unit value of "1" is entirely up to somebody's perception to determine. People in Japan are "investing" in the US Dollar. What is an "investment" now, should it become widely accepted as that unit of "1", will no longer be an investment, and thus suitable for being an investment currency in other investments.
The only use of bitcoins in this regard is tax-evasion and even then there are better ways but fine; I do not object to the use of bitcoins as a way to invest in other things. On the contrary.
So if I missunderstood you there I beg your pardon.
Still it seems you refuse to abandon defending bitcoins as a sound investment in terms of macro-economic implications.
You were the one that said that if people use bitcoins they are detracting from society because they are not investing. So

Of course I consider Bitcoins a sound investment, that is why I own them.
Generally speaking you do not want a currency like Bitcoins used as an intermediate currency for investment precisely because of drops like these which carry an additional risk to your investment strategy.
What? If you are using Bitcoins as an intermediate currency, then by definition you are not exposed to any risk of fluctuation. That is why Bitpay is a thing. All "startup" currencies by definition will have fluctuations in price relative to all other currencies. This is something that will (hopefully) decrease over time
You have absolutely nothing to lose on using USD and converting them into statepapers or investing into long-term interest funds while waiting for a new bull-investment as opposed to doing the same with bitcoins.
This is assuming that USD will always be more stable than Bitcoin. The USD, by definition, is unsustainable. The very way in which it is created ensures it cannot be sustainable in the long term. Bitcoin can be stable. It isn't necessarily stable, but if bitcoin were "sticky" it would be a lot more stable than the USD.