This is again irrelevant to the point the OP and blog post author were making. If the number of tx/block continues to increase, then the current level of network security will increase, all else being equal (eg. USD price of Bitcoin staying flat).
> on a 6-12 month timescale bitcoin has been absolutely terrible investment
Absolutely, but long price downtrends have happened multiple times in the past. That's why I asked "what makes you think this bubble, as opposed to the last N bubbles, is clearly different and clearly marks the end of Bitcoin?".
> which you did use as an example
Well I didn't, the OP did :)
> There is no mention whatsoever on how many purchases they have that is being made with bitcoin.
I was pointing to these slides because they show a multitude of metrics increasing. It seems unlikely bitcoin purchases would be declining given everything else is increasing: number of bitcoin startups, number of wallets, number of merchants, number of daily tx, etc. Individually these metrics mean little, but all combined... Heck we went from 0 to 100,000 merchants since 2009, so it is certain bitcoin purchases have increased in that time frame. Why would you doubt that?
> Do you happen to have any data about the purchases made specifically with bitcoin?
Very few merchants publish their bitcoin metrics. But 2 come to mind: Gyft and Newegg said that their 2014 Bitcoin black friday sales were the best ever: http://blog.bitpay.com/2014/12/09/bitcoin-black-friday-2014-...