Yes it is.
People always forget their passwords, send their money to the wrong address, get their computer broken etc etc...
The available number of bitcoins are decreasing every day.
I dont agree.... saying that bitcoins are decreasing is the same as saying number of lost bitcoins is higher then generated bitcoins. and its probably not.
Wait, wait. I dont think we are on the same page here.
Available bitcoins are the one's being mined now right? Right this moment. Yes it is decreasing. I have read that there is a limit to the maximum mined bitcoin so if there is a limit? then it will be depleted right?
Not exactly. There are 25 bitcoins created every 10 minutes. In a couple months, that will drop to 12.5 new bitcoins every 10 minutes. Then in four-ish years, it will drop to 6.25 new bitcoins every ten minutes, and so on every four years or so.
As you can see, it will take a very, very long time before the number of coins being "lost" ever surpasses new Bitcoin creation. We are nowhere near it now, and we won't be for the foreseeable future.