With all the scam and hacks and withdrawal issues going on on the Exchanges, it's very untrustworthy.
And to wait for withdrawals for some days, if I want withdrawal, it should be like an ATM, just instant payout!
Not waiting some days for the cash, and eventually then for the worst rate in this time. If you even get the withdrawal.

Do all the Miners go to the Exchanges and throw their coins in there??

Any other Sources? Or trustworthy Markets? To avoid Exchanges?

Where can I buy Dimecoins??