How long does it take to develop a cryptocurrency?

The time required to develop a cryptocurrency varies based on its complexity and features. A simple cryptocurrency can be developed in a few weeks if using an existing blockchain like Ethereum, where you can create a token using smart contracts. However, if you're building a blockchain from scratch, it can take several months or even a year, as this requires designing consensus mechanisms, developing nodes, and rigorous testing. The development timeline also depends on the size of your development team, the security protocols you implement, and whether you plan on adding features like smart contracts or decentralized applications (dApps).
source: www.blockchainappfactory.com/cryptocurrency-development