I doubt anything that resembles a "pyramid" exists in Florida, there just isn't places for it to hide this long. I could see where maybe there is an indian mound that resembles a pyramid (very small however), or where there is something that has a passage that goes underground.
There are a lot of bat $#!^ crazy people out there however. Also, I don't trust the archaeologists for Florida. They almost remind me of church elders of some religion. They keep most of the knowledge for themselves, share very little, even though its us, the people of Florida, that pay their salaries. So much of what they research is off limits to the public, the records, the findings, etc. What is the point? They are the last people I would involve in any discovery.
The glades just doesn't seem like a good choice for any real treasure. Its difficult to place anything in there, difficult to recover and is just a bad location for safekeeping.
If Valentine and Hudson would have put all their time and resources into finding REAL treasure, like Mel Fisher did, they may have just come up with something. One thing is for sure, there is plenty of gold still left to be found in the waters off Florida.