I'd like to switch to methane but I can't make up my mind. Despite the economic and ecological advantages of methane, I've been told that methane is dangerous.

Compressed methane tanks are extremely safe.
They undergo thorough testing before being certified as fit for purpose, as well as at regular intervals throughout their life.
(See the previous question)
The unusual resilience needed to withstand test pressures of 300 bar and operating pressures of 220 bar also makes the cylinders unusually resistant to knocks and blows.
The use of tried and tested components, installation procedures that prevent leaks occurring due to malfunction, and the intrinsic features of natural gas (high ignition temperature; ignition possible only when a given mixture of gas and air is present) are all important safety factors.
Being lighter than air, methane disperses easily instead of building up in underground areas or near to the ground.
Ministerial Decree 1 February 1986, which lays down "fire prevention and safety measures for garage construction and use", makes no distinction between methane-powered and petrol/diesel-powered vehicles.
Other countries have also given the thumbs-up to methane. Tests carried out on methane cylinders by some of the world's leading safety organisations (Bureau Veritas in Norway, EPA in the US, etc.) have always produced extremely positive results, confirming the absolute safety of methane-powered vehicles.
A report by Norway's Bureau Veritas states that the risks associated with methane are no greater than those associated with petrol and diesel.