<p>Technically, yes, yes, and yes.  However, I'm not sure if we'd still call it "Bitcoin" at that point.</p>

<p>Any of these changes would require a hard fork, which means that the underlying rules of the system are changing in a non-backwards-compatible way.  It means that blocks/transactions from after the fork are not guaranteed to be considered valid to nodes running software for pre-fork.</p>

<p>So, to change Bitcoin like this in practice would require convincing the entire rest of the world to agree with the changes.  Anything less, and you will end up with two versions: the original and the one with your changes.  Which one gets the title "Bitcoin"?  I don't know.  That's a non-technical question, and a point of contention.</p>

<p>For an example of this in practice, see <a href="https://www.investopedia.com/tech/bitcoin-vs-bitcoin-cash-whats-difference/" rel="noreferrer">Bitcoin Cash</a>.</p>

CC BY-SA 4.0
2018-12-14T21:38:56.287Z
that means : change is possible technically, but it required to be soft-fork nor it will cause a new hard-fork . thank you for your clear answer. my question was because i have thought about what bitcoin situation will be if its price decreased to a low levels for long years from now and  may its mining rewards will  become uneconomic .so there are many solutions to avoid that .
H Akhali
CC BY-SA 4.0
2018-12-14T19:49:32.777Z
2018-12-14T19:49:32.777Z
Jestin
<p>Also, is it possible to change the reward cycle duration or the number of mining- reward coins?</p>

CC BY-SA 4.0
2018-12-16T20:19:40.823Z
related: https://bitcoin.stackexchange.com/q/38994/5406, https://bitcoin.stackexchange.com/q/161/5406, https://bitcoin.stackexchange.com/q/8439/5406
Murch
<bitcoin-core><mining-reward><reward-schedule>
Is it technically possible to change the total amount of Bitcoin?
H Akhali
# Is it technically possible to change the total amount of Bitcoin?

(Asked by: username_0 on 2018-12-14)

Also, is it possible to change the reward cycle duration or the number of mining- reward coins?

**Tags:** bitcoin-core, mining-reward, reward-schedule

> **Comments:**
> **username_1**: related: https://bitcoin.stackexchange.com/q/38994/5406, https://bitcoin.stackexchange.com/q/161/5406, https://bitcoin.stackexchange.com/q/8439/5406  

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## 1 answers

### Answer by username_2 on 2018-12-14. Score: 5

Technically, yes, yes, and yes. However, I'm not sure if we'd still call it "Bitcoin" at that point.

Any of these changes would require a hard fork, which means that the underlying rules of the system are changing in a non-backwards-compatible way. It means that blocks/transactions from after the fork are not guaranteed to be considered valid to nodes running software for pre-fork.

So, to change Bitcoin like this in practice would require convincing the entire rest of the world to agree with the changes. Anything less, and you will end up with two versions: the original and the one with your changes. Which one gets the title "Bitcoin"? I don't know. That's a non-technical question, and a point of contention.

For an example of this in practice, see [Bitcoin Cash](https://www.investopedia.com/tech/bitcoin-vs-bitcoin-cash-whats-difference/).

> **Comments:**
> **username_0**: that means : change is possible technically, but it required to be soft-fork nor it will cause a new hard-fork . thank you for your clear answer. my question was because i have thought about what bitcoin situation will be if its price decreased to a low levels for long years from now and  may its mining rewards will  become uneconomic .so there are many solutions to avoid that .  

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