Speculator. Investment is something else entirely. You have something at the end of the day when you are investing, there is simply no way to lose your capital. Risk is kept to a minimum. Speculation on the other hand is, well, roll the dice again let's see what happens... The difference is subtle - so subtle that most people don't get it. But it's the difference between buying a piece of land or a barrel of crude oil versus buying, well - Bitcoin... It doesn't matter if you made millions with bitcoin - you did it by speculating rather than rather than investing? Why? Because not a person on earth can tell you or me why exactly bitcoin is the price that it is today, or the price it will be next week. It's extraordinarily volatile, no one is sure how many bitcoins there actually are, no one is sure how many bitcoins to charge for a given product (why should I sell you something for 1 bitcoin today that you might have to pay 2 bitcoin for tomorrow?), etc. Until someone can work out that bitcoin is not responding simply to low volume, DDOS attacks on the exchanges, and price manipulation by a few wealthy people, it's just gambling plain and simple.
There's nothing wrong with gambling if you're into that sort of thing, but you have to be aware that it is very possible that suddenly end up with nothing at all. Like the guy who sold his house for one tulip, right before the tulip market crashed (forever).
A tulip is a "something", and no matter what the "something" is that you buy, you can most definitely lose your capital if the value of that something disappears to virtually nothing. Your entire argument is shot down by your last sentence.