The OP talks about wanting to spend his BTC.
The responses are referencing getting rich quick and remembering the past dips rebounding.
Hilarity.
They don't care, just say the same all the time, to the moon blah blah.
English is not my main language, but was pretty easy to understand what OP was saying.
He wanted to buy something with BTC, in the process of getting bitcoins and doing the transaction the price changed.
Yes, no one can really say what the price of bitcoin is going to do. It would seem most practical to me for a 'believer' to have a buffer wallet with spend-ready coins, then aim to replace them through exchanges or something like local bitcoins (although this all depends on personal finance etc.).
It seems odd that the OP would not at least have perceived the risk of his bitcoin value decreasing through the time taken to undergo the transaction via exchanges, though? Even through local bitcoins it can take up to a few hours depending on the availability of the seller. You can't just lose faith over something that is common knowledge and experience?
I think people are forgetting how early it is still. Nearly 50% of the UK or something daft like that want to ban it because they don't understand it. So much uncertainty still.
Just my opinion, of course.
~kp