Does anyone know if Coinbase (not GDAX) will negotiate their rates for high volume accounts?

Is it enough to back up my Electrum wallet file once if I disable change addresses?

Are there any choices for selling BTC for USD besides coinbase.com and localbitcoins.com?

I'm using Multibit Classic 0.5.18 with a single BTC address.  Do I need to re-backup periodically or will my original backup always restore my entire balance as long as I keep using the same address?

I know I can use Poloniex as a mixer to prevent anyone I send BTC to from knowing all of my transaction history but the BTC withdrawal limits there can be a problem.  Can Coinbase be used as a mixer in the same way and is there a limit on BTC sends at Coinbase?  I know there is a buy/sell limit there but I can't find anything about a send limit.

Is there a site with fiat price charts for altcoins?

Is there a good site for investigating altcoin inflation rates?

I get ACCOUNT_DISABLED when I try to withdraw from Bittrex.  Has anyone seen that before?  I submitted a ticket.  Are they starting to require KYC?

It seems like there's a problem with every single deposit or withdrawal I make there lately which requires that I submit a ticket.  One issue has been outstanding for over a month and the rep just tells me how sorry he is and how mad he would be in my position.  I've had to submit so many tickets that I can see from the ticket numbers that there have been a massive number of tickets submitted there lately.

Has anyone been able to withdraw SWARM from Polo since they announced they would be closing the market?  My SWARM withdrawals have been disabled there since the announcement and I'm wondering if it's just me.

I missed the Lisk and Digix crowdsales.  Is there a good way to find out about crowdsales before they're over?

So many times now I have dumped some coins into a Poloniex market only to find that my sell was only partially filled.  The buy orders which were in place the moment before I clicked the sell button apparently disappeared.  This has happened so many times now that I'm confident Poloniex is front-running the orders.  Has anyone else noticed this?

Which ethereum dapps are you most excited about?  I like Augur.

Whenever I log in, after 2-factor it just dumps me back to the home page and I'm not logged in.

Is there a desktop client for Omni so I don't have to put my private key into omniwallet.org in order to move MAID?

Are there altcoin trading bots available to use or do I need to write my own?

This morning I signed up on Livecoin.net, deposited BTC, and enabled 2-factor authentication and was then presented with a message that said a change in security settings causes a 48-hour hold on withdrawals.  I was not warned about this whatsoever before I deposited BTC or enabled 2-factor.  There is no reason going from a disabled 2-factor to an enabled 2-factor should cause a security hold.  Is there anything I can do?

EDIT: They made an exception for me.  Much appreciated.

I saw Dope last night and bitcoin is mentioned a whole lot.  Has anyone heard bitcoin mentioned in another mainstream movie?

Almost all of the alts I hold have dropped as BTC has risen lately.  It's been a major disappointment.  The only one that hasn't is Bitcrystals (BCY).  Have any of your holdings held steady or risen as BTC has risen lately?

What are the ways to get BTC quickly in the US?  Here's what I can think of:

- Coinbase instant buy
- Circle instant buy
- wire money to an exchange
- BTCjam or another loan site
- Bitcoin ATM
- Localbitcoins

I've already maxed my Coinbase and Circle instant buys for the week.  Any way to increase those instant limits?

Which exchanges will credit a USD bank wire right away?

Will any of the loan sites issue a BTC loan right away?

There are no Bitcoin ATMs in my area and I'd rather not use Localbitcoins.