So i was thinking if i send a bitcoin transaction without the miner fee or a very low fee what will happen ? would i get the coins back eventually ? or they will just stuck there forever ! and if that happened how to do that double spend ?
It's, sometime, called Double spend. the bad news for you is that minners will ignore your transactions, they won't be confirmed. The "good" news for you is that you can cheat that Bitcoin because you can tell people that you signed the transactions but it is not and will not be confirmed.
Aside from that, you will also get to have much delay in accessing your coins. This is really a sad part. It may really take time before your money is give back to you again after a failed transactions.
Well that's a small price to pay for being stingy, how can you expect to send a transaction for free?
The miners ought to eat dude! So for contributing their hardware, power and internet you just want to send your transactions without appreciating their effort? I think you deserve to loose half the amount you sent without the fees
I always disagree with such attitude
Miners are there because this is the whole idea behind decentralization. Decentralization is the ultimate aim of mining as such, i.e. keeping the network decentralized since it allows Bitcoin to exist and not lose value in a trustless network, where no one trusts anyone else. Thus the point of miners wanting to eat or earn profits in general is utterly inconsequential to that (conceptually), while the transaction fees themselves are only one of the methods to incentivize people to become miners and allegedly keep the network decentralized. But the practice clearly shows that this method doesn't work in the long run and in fact eventually leads to the opposite of what it was intended to reach, i.e. to centralization instead of decentralization