I'm now using bitcoin to gather funds to advance the movement I'm on.
The subject line of this thread and the post body simple doesn't match with each other. However, let me tell you that bitcoin doesn't guarantee full anonymity. Because everything is available through a public ledger called blockchain. So all your transactions are recorded in the blockchain and can be easily checked by anyone in the world. So bitcoin is not anonymous. You may want to use mixing service which will ensure some level of anonymity though.
Also my question to you is that, if you are not doing anything illegal why do you want it to be secret? If you are doing anything for a good cause, you can do it openly. It is certainly depends on the people who want to use bitcoin for the good and bad cause, but as I have mentioned before, bitcoin is not anonymous so you may not be able to hide your activities properly using bitcoin. If you want to be truly anonymous, please use some altcoins with integrated TOR network.
There are just peoples out there especially who are rich and hold status who don't want to be known especially doing something that have 2 sides supporting and opposing it.