Please forgive my cynicism.
I was offered bitcoins in I think 2010 when they were 50p each.
I was tempted to buy £200 worth but had been just lost £200 to a ponzi money scheme so decided against it!

I have seem recent reports saying they are now worth £2,500

Are these the same Bitcoins?
So would I be able to actually sell for cash or money in the bank?

Sorry to ask, but I see lots of people saying they are millionaires but don't think I have seen anyone with the actual money banked.

I mean, my 400 bitcoins would now be worth £1,000,000 and I could actually sell them for £1Million less commissions?

You gotta see I'm sceptical.
Please tell me I haven't made the biggest mistake of my life?