I would say the for ordinary investors, the marketing activities have a critical role to play when it comes to attracting their attention. For seasoned backers, they will dig into the profile of the management team and the tech team before checking their business model and revenue prospect, but still marketing is very important. 

The price is going south. 

It's hard to judge/determine the price of BTC. It's fine to get some in my opinion.

bitcoin is the first "cryptocurrency" and it's the most famous coin for the general public. It has circulation hard cap. When you want to buy altcoins, probably you need to use bitcoin for your purchase. That's why people like bitcoin to other coins.

emailed, pls check 

interested, pls PM me.

US$100 for a member account? PM.

Can you PM me for the deal? Thanks.

It takes a long time for Trezor to support the forked coin. 

Yes and no, LOL. As the transaction fee is too high lately for btc.

Gold is a mechanism to store value / purchasing power, though we cannot use it directly to buy goods or services nowadays due to the difficulty of measurement.

Bitcoin, on the other hand, is hard to be a payment method due to high transaction fee a slow transaction time when it comes to small payment.