If you think 30 seconds is too low for you then I think cryptocurrencies are not really for you. Or you may take a look at Ripple xD
I am fine with waiting 1 hour to see a Bitcoin transaction fully completed, it's much better to what it was sometimes before. Of course, faster than 1 hour would be nice too
I don't know much about how BTC or ETH works, but why all cryptocurrencies takes so long to confirm a transaction. I think even 30s is too long, why cant it be instant like PayPal?
it depend on market because if you sell bitcoin into ethereum you cannot transact it easily because you need to wait until your item (coin) will buy.
I think you should read the OP more carefully to avoid to reply out of topic