1. lack of support from payment processors to go out and do sales pitches to businesses:-
 i have personally told bips, bitpay and coinbase of 5 merchants that wanted more info. and as of yet (upto 1 year in one case) the merchants have not had a single response from the gateways

2. software is still in beta phase and not ready for average joe (7billion population) daily spenders:-
a truly trusted service that actually adheres to consumer protection guidelines (liability insurance to protect customers holdings) to then be used as a offchain service for pre-confirmed funds, making it an instant use wallet to send funds as small as 1sat to merchants.

3. hardware/cold wallets are still in beta. yes trezor(hardware) and HD-01(coldstore) are still not 100% secure or easy to use for long term large storage.

4. bitcoin protocol is not ready to handle heavy volume, it is also not adhering to consumer requirements, but it is more twisted in favour to miners greed.
lets see 'death and taxes' appear with rebuttals to defend the miners honour, like always

in short, we are still in the innovator/early adoption stage.. we have a long way to go yet before being in the mass adoption: public stage

5. exchanges are now having $10k FIAT deposit limits. this means the days of rich investors throwing 10's to hundreds of thousands at an exchange are over. thank you AML policies.

Hi FUR11, yes, I think that security is real issue that need to be solved. People are easily manipulated and when they send their money, there is no chance to get it back, people should use btcrow.com or some another escrow service.

Some another opinions what should be done in bitcoin ecosystem?

Hi Anders, thanks. What do you think will be revenue for such businesses (payment gates) that won't charge any fees for transactions? Is it profitable and if not, are such businesses able to survive if everything will be free? What do you think?

Ease of use and security are on the top of my list right now but I'm thinking greed should at least get an honorable mention.  

I think the biggest problem is people's perception of it or that it's too difficult to use, which it isnt. I think this will slowly chnage over time, though.

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you do realise that coins are on the blockchain right? they never leave the blockchain.. EVER, the only thing you need to keep safe is the private key (imagine it as the password that proves your identity to do transactions.) the privkey is not "holding" bitcoins. so just look after your private keys securely away from a computer that can be malwared, hacked or lost in a computer crash/ accidental  hard drive format.

When merchants are using these services, here is what happens in 90% of cases:

User buys Bitcoin from an exchange using his bank account
User places order with merchant.
User sends BTC to Coinbase.
Coinbase temporarily hold BTC and send it back to the exchange.
Coinbase sell the BTC and exchange sends money to their bank account.
Coinbase sends USD from their bank account to merchants bank account.
Merchant sends goods to user.

If you're going to tell all merchants to use services like bitpay/Coinbase, then why use Bitcoin at all?

Why not just send direct to the merchants bank account and avoid bitcoin altogether?

All this seems to do is expose the buyer to more fees and expose the merchant to unnecessary risk, as they have to trust Coinbase to send them the USD. They could be hacked, they could be goxxed (poor management leading to bankruptcy) or they could one day pull a massive scam, one of which is bound to happen one day to at least one of these services.

In addition Coinbase has recently implemented stringent AML requirements. They now require users of their wallet service to specify if a transaction is to a Bitcoin business and to give the businesses URL, information which can be used to do blockchain analysis and hinder the anonymity of everyone using bitcoin. And this is only going to get worse as these kind of services are put under more pressure to try and stamp out "money laundering". No doubt one day in the near future we will see Coinbase freezing accounts for AML issues.

Why should a merchant do all of that when it can accept BTC directly with no risk at all. Sure they have to trust an exchange if they wish to change some of it to fiat, but in this way they are encouraged to keep the money circulating inside the Bitcoin economy by spending their BTC - for example by switching to suppliers who accept BTC and paying employees in BTC (which is perfect for those outsourcing to emerging economies). This in turn is what will lower the price volatility.

We really shouldn't be encouraging merchants to use these services, these services should be a "fallback" for merchants whereby it isn't viable for them to accept bitcoin directly.

I have to agree here.   I fully understand that people need to be responsible for their own money (just like with cash), but I think security and the risk of theft is one of the major things that steers a lot of people away from cryptos...

you dont throw someone that has never swam before, into the deep end and tell him its in his best interest to hold his breath.

instead you find the easiest way just to get him to try it, even if he aint going to use the pool ever again. atleast letting him get his toes wet he will see how easy it is to say "yes customer heres a QR code". once they have got their toes wet, then you introduce them to the art of swimming, diving in head first, or somersaulting into the deep end (investing).

another analogy
dont throw 5 eggs at him at once or he will just defend himself and the eggs will just hurt him and break. instead gently hand him one egg and and then a second egg.