<blockquote>
  <p>If I just leave them as is, what happens?</p>
</blockquote>

<p>Nothing, if a fork occurs, you get coins on the two sides of it.</p>

<blockquote>
  <p>If I switch my Trezor to UASF, what happens?</p>
</blockquote>

<p>If you do not spend your coins after a fork happens, nothing happens. If you spend coins <em>after</em> the fork, you might expose yourself to replay attacks <em>even though</em> you are transacting on the UASF chain. That means your transaction on the UASF chain might also happen on the other chain without you intending to. You can find more information about replay attacks <a href="https://themerkle.com/what-is-a-bitcoin-replay-attack/" rel="nofollow noreferrer">here</a>.</p>

<blockquote>
  <p>Do I get coins from both chains? Do I need to pick one before August 1st?</p>
</blockquote>

<p>You'll get coins from both chains for all the coins you have before the split occurs. If you buy coins after the split, you'll only get coins from the chain you bought them on.</p>

CC BY-SA 3.0
2017-07-07T15:38:22.297Z
2017-07-07T15:38:22.297Z
alcio
<p>With the upcoming UASF activation what do I need to do to come out okay? I have my coins sitting on my Trezor in cold storage.</p>

<p>If I just leave them as is, what happens? </p>

<p>If I switch my Trezor to UASF, what happens? </p>

<p>Do I get coins from both chains? Do I need to pick one before August 1st?</p>

<blockchain-fork><bip148-uasf><activation-mechanism>
UASF, what do I need to do?
Anon6721233
# UASF, what do I need to do?

(Asked by: username_0 on 2017-07-06)

With the upcoming UASF activation what do I need to do to come out okay? I have my coins sitting on my Trezor in cold storage.

If I just leave them as is, what happens?

If I switch my Trezor to UASF, what happens?

Do I get coins from both chains? Do I need to pick one before August 1st?

**Tags:** blockchain-fork, bip148-uasf, activation-mechanism


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## 1 answers

### Answer by username_1 on 2017-07-07. Score: 1

> If I just leave them as is, what happens?

Nothing, if a fork occurs, you get coins on the two sides of it.

> If I switch my Trezor to UASF, what happens?

If you do not spend your coins after a fork happens, nothing happens. If you spend coins *after* the fork, you might expose yourself to replay attacks *even though* you are transacting on the UASF chain. That means your transaction on the UASF chain might also happen on the other chain without you intending to. You can find more information about replay attacks [here](https://themerkle.com/what-is-a-bitcoin-replay-attack/).

> Do I get coins from both chains? Do I need to pick one before August 1st?

You'll get coins from both chains for all the coins you have before the split occurs. If you buy coins after the split, you'll only get coins from the chain you bought them on.


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