Someone has already corrected you on this - but I'll reinforce the point. You cannot distinguish between Bitcoin and the Bitcoin blockchain. They are one and the same thing - and yes, it is a technological advancement.
Can technology be copied ? Sure. You have been invited countless times to setup Marmalade coin - see how that fares as I can assure you that the argument that Bitcoin is not finite because we can have 1500 odd coins is nonsense. Any without merit (of which there are a shed load) will eventually disappear. Those that do have merit will carry out - but they may have a completely different application to bitcoin. Those that have merit and wish to supercede bitcoin may well do so...or again, if they don't, they will fall by the wayside. Bottom line - having loads of crypto's does not dilute the finite resource that is bitcoin.
You could use the same analogy with FIAT. If you started a new FIAT tomorrow, does it dilute the strength of the USD or Euro?