In a month, Segwit (BIP148) will be implemented on Bitcoin
i believe it will be implemented only if it can gain enough support.
and many people are uncertain on what effect it would have on Bitcoin's price.
the effects of implementing SegWit on bitcoin is pretty clear. there will be a rise.
the effects of how to implement it is unclear. it can be a smooth transition with majority support or it can be a hostile change with low support and a risk of chain split.
Maybe that is why the price of Bitcoin has been fluctuated,
no it is not.
the fluctuations are normal and they happen every time after there is a rise. price becomes stable between two high and low prices where people who don't know what is happening are becoming confused why bitcoin is not rising 24/7/365!
folk
do you have a lisp?
Question is, if folk happened, for those vendors who accept bitcoins, how are they going to manage accepting the two different coins?
fork does NOT mean automatically we get two coins!
there is a small chance a split happens from any kind of fork and if that happens because of how big bitcoin is i expect one of the chains to die soon and we will be left with only one chain.
For those who keep their coins in cold wallets, what would happen to the coins?
there are many topics on this. please use the search function!
How does a Bitcoin platform, like Coinbase for example, manage its customers' deposited coins?
you have to ask Coinbase.
And the most important question is - would Bitcoin price drop in the short run or even in the long run due to the folk?
i explained this already.
it depends on how the fork is going to happen.