Hello and welcome!
I am not sure what you want to achieve, hence I'll write some words in here.
This for shure is going to pump the price of Bitcoin and not only that
Bitcoin is not only about pumping the price. Plus, if you have a magic idea to make a coin more expensive, I am sure that quite some altcoins would want to test your idea (at least to get them worth more than nothing).
I know that if you put it more difficult is going to slow down all the blockchain but it will whort it
Actually every 2 weeks be blockchain difficulty is adjusting itself, so if at that point it's high and the blocks come too slow, it will be decreased automatically to stay in the "one block about every 10 minutes" area.
Plus, the difficulty is supposed to rise only if there are many new miners.
So please, tell more details (hopefully something clearer) about your idea because as it is:
* it makes little sense
* it is unclear what you will achieve technically
* it is unclear how you will achieve that technically
Tell Me What you think and its my personal vision if you dissagre tell me that too

For now you said pretty much nothing, hence nothing to agree or disagree with.