Yes, bitcoin is the future, as I said, and I see that amazon will soon be dealing with Patkon, and not only is it going to spread the culture of Bitcoin in the years to come and getting involved in everything is normal.

maybe all online sites will do bitcoin as payment method because bitcoin is now famous as of many people that is using internet know about bitcoin and they will push this for that to happen.

I think the main reason for this is the rising price of Bitcoin. It's price is reaching new heights day by day which is making people more interested  in it.

i think high interest in bitcoin because in a few month bitcoin price's increase so fast.
So they are interested to know and invest in bitcoin

Yes, the price growth from the starting of the year seems to be much higher than the past years. This has made people to give a look upon bitcoin much more than the past year. Also if the same growth continues to happen, surely we'll reach usage similar to fiat as more people have started to come into bitcoin.

Sure it is increasing. It is a new way how to pay for something and people get interested. As all the good news around bitcoin are becoming prevalent over the bad news, it is becoming more acceptable.

the risk faced by the site is not as big as the market because Bitcoin's current main function is an investment asset, trading and goods transaction, long transaction time results in so less people using Bitcoin as a tool of payment and they prefer to HODL their Bitcoin.

yup, this become a strong reason to not use Bitcoin as a payment tool and also Bitcoin takes a long time to confirm the transaction. This volatility is very difficult to be removed from Bitcoin because of market intervention and the confirmation of a transaction cannot be eliminated because confirmation is a must in every transaction.
because of that, then the solution is should be done by the site, which is to make their own coin so the price used on the site is maintained.

The reason that bitkoyn is becoming more popular, maybe today's unstable position around the world. I think that its popularity grows especially strongly in those parts of the world where its own currency falls and loses its value. In this case, bitkoyn can be an attractive way to save your money. I compare bitcoin with gold. But if gold is a very impractical way of storing money, bitkoyn is much more practical. It is virtual, and it is easy to forward it.