Major exchanges declared BU an altcoin which will be traded as "BTU" should the contentious hard fork happen.
With almost 80% of nodes supporting SegWit, thus Bitcoin Core, this fork will be rejected by the majority of the Bitcoin economy.
Read more about Segregated Witness.
It is then wise to assume the following scenario unless current situation changes rapidly:
- both coins will temporarily lose their trading value as "weak hands" are being forced off the market
- less economically supported coin (BTU) will be losing its value more rapidly
- most BU miners will switch back to Bitcoin Core as their altcoin is less valuable and not profitable to mine
- BTC will eventually regain its lost value as progress continues
Let's operate with above assumptions in the rest of the article.
#1 Sell one for another
After the hard fork, Bitcoin "hodlers" will have access to both original BTC and new BTU. They can spend any unspent outputs on both chains as if it was 2 different coins (it is).
Holding both BTC and BTU will make your wealth's value shrink mid-term though as one of the coins will essentially become worthless.
In that case selling BTU for BTC early on will "double" your bitcoin holdings and partially protects you from BTU's sharper loss of value.
This move is very risky though so conservative investors may want to wait until the market decides which coin is more valuable.
#2 Short sell
Regardless of which coin will eventually become more valuable, make sure to short both to maximize profits.
#3 Buy cheap
As the bearish sentiment is fading away, use the short profits to buy cheap bitcoins.
At some point, the price will reach its long-term support levels and starts going up again. You can either buy bitcoins with all your profits at once, or you can diversify the risk by buying steadily as the price keeps rising.
If you feel like taking more risk you can long buy BTC with a leverage for extra profits.
Enjoy your profits
Using the above method you are able to play the market that will be driven by fear as weak hands are panicking.
On top of making fiat money while shorting Bitcoin, you can double or even quadruple your BTC holdings if executed correctly.
Patience is the key, though. To get from the point where bitcoin price is crashing to point where it's regaining its lost value may take years.
Be prepared to get emotionally drained. It will get messy!