For bitcoin, November is a step into the unknown.

Despite its steadily increasing price, not to mention a growing acknowledgment from the financial mainstream, the technical roadmap for the cryptocurrency has never been so hotly contested.

After years of debate on the best path forward, a new code proposal called Segwit2x is set to put the cryptocurrency – the world’s largest by value – to the test. And while it boasts significant support from miners and businesses, it remains unclear whether the new code will change bitcoins’ rules, or if another new cryptocurrency will be created (one already being branded bitcoin2x by some).

Quite simply, there’s never been a larger change to the platform, nor one that has been the subject of such criticism and scrutiny.

And it might not be all free money. As developers are keen to note, this is bleeding-edge science; in short, we’re in uncharted territory, and if past forks are any indication, decisions could lead to consequences – for users, investors and the market at large.

Read more: CoinDesk