i wouldn't call anything that you said "speculation", it is only your "opinion" based on your assumption that bitcoin is useless and is not being adopted by anyone at all and is dying.
What's the difference between a speculation and an opinion? Aren't these the same?
You could speculate that Gold will rise to $2,000 and you can have an opinion that it will rise to $2,000
What's the difference?
not exactly.
an opinion is just an opinion. it doesn't have to be true or based on any facts. it is more like how you feel. it can be true or false but whatever it will be, it will be that based on luck. think of it as taking a shot in the dark and having the chance to hit the target.
opinions without logic don't matter and are not worth sharing.
an speculation on the other hand has to be based on facts and analysis. it has to be close to reality. so for example when you say "gold will rise to $2000" you have to have analyzed the market and checked the facts then come up with that speculation. this can be technical analysis, fundamental analysis, ... and then choose a number based on that analysis. not just because you feel like gold should rise so you chose a random number (a round number at $2000) and say it will be that.
speculations matter and are worth sharing.
what you did here is that you made a vague statement ("because there isn't any fundamental behind it") and then based on that you said bitcoin should fall!