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Please don't get me wrong. But i would like to correct you a little bit.
Litecoin. (LTC)
And Litecoin is hardfork from Bitcoin. So they are like a brothers.
Bitcoin is older brother of litecoin. and it is designed to support bitcoin. not replace it :)

Ok may be you are right but if every hardforh designed to support for main crypto currency or Blockchain then why Bitcoin Cash not supporting bitcoin? And bitcoin SV not supporting bitcoin ABC?

for example litecoin hardforked from bitcoin. and they are working together i mean( lightning network) if you ever heard about that?

actually bitcoin cash creator Roger Vier. Supports bitcoin. From the beginning. but he is telling everybody that btccash is better because of transaction speed. Everything else the same as btc. and Roger Vier have web page called bitcoin.com go and have a look ;)
bitcoin cash creator not supports bitcoin SV(and bitcoin SV is bitcoin cash hardfork) and not supports because of the bad partnership experience.
Bitcoin abc, bitcoin diamond, bitcoin gold, or other hardforks are just copies nothing more, just names are different but functionality is the same as BTC.

As i mentioned in my first comment its 100% possible a hardfork can overtake its parent crypto cuurreny .tell me its possible or not?

but then what the difference is if hardforks are same as original?
Btc could be replaced sometime in the future with more progressive and more innovative or way better projects than btc. But if we think logically are original can be replaced with a copy?

Litecoin isnt a copy tho it is slightly different haha, I agree with you, until the point tho that its not possible it is 100 percent possible, just uh extremely extremely unlikely imo but deffintly possible

I doubt they will as LTC does not want to do that they wish to supplement BTC, but my local pot shop uses LTC as way to accept visa cards, and they said it works great so who knows if most people and businesses use it, it could but i sorta doubt it as I see governments eventually trading in bitcoin, to avoid us sanctions, as its the most proven, securest, and most well known

Who knows may be in future Litcoin become most proven, securest, and most well known.nothing is permanent in crypto currency world

Yes indeed, was just giving my opinion, anything is possible! I think both bitcoin and litecoin will be wildly successful, and like i said litecoin is already being used for point of sale purposes at a local store with lots of busniess, with great sucess! Believe in them both alot, but like a gold and silver relation, but like you said who knows the future

I agreed with you but i think in future any Altcoin like litcoin and digibyte will replaced bitcoin from its first posion and bitcoin will become less relevant and stay in top 10 only
but its totally my personal opnion

Yah that is possible, I tend to think bitcoin will also have some big updates soon to enable it to hold its own, it does still have the most devs working on it compared to any other cryptocurrency, but its pretty much a guessing game any of us can be right or wrong! Good luck to you and I hope the future leans to your favor

Thanks bro lets see bitcoin is a backbone of all crypto currency ecosystem so there is possibility butcoin keep its posion
But I also like some Altcoins like ,Dgb,xlm,ltc,steem etc

Me too! I love me some alt-coins, specially delegated proof of stake coins like steem! I think there is room for alot of them, not just one, and in my opinion there will be a streamline way to exchange them instantly so places can accept any coin they want, and any holders of any coin can still shop there, while bitcoin simply stays the backbone to price all coins in, but that is prolly a few years down the road

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