I know this subject has been looked at before but with the speed at which the cryptospace changes I felt the subject deserved a fresh look, and why not obtain that fresh look from the experts that are currently at the forefront of using crypto, namely all of you here on Bitcoin Talk forum.
I know there will be a time when it will not be necessary to change from fiat to crypto and vise versa. Hell that time may already be here. If the time has come where that exchanging of one to another is no longer necessary then i definitely need an update because that would save a lot of time and money. So if you would please share your insights and knowledge with the rest of us on what the most efficient way you have found for

1. avoiding the whole exchanging from crypto to fiat to take care of financial responsibilities out side the Crypto-space

2. what is the most efficient and cost effective way you have found for the exchanging of crypto to fiat?
Please remember that ideas are awesome and helpful to further a subject so please do share yours, but with that being said please remember that lots of people that read this may be new to crypto so please do include details and specifics such as names of places, cost and special steps that maybe needed to accomplish your way of doing something. I want to thank you all in advance for your participation and for all that you give on a daily basis to help improve and add to the Crypto-space.
That ain't about the central vs decentralized but is actually about the fact of which the first is more convenient, if I get to convert my crypto foreign currencies into fiat directly with a good payment and done easily I would but what is more convenient for me? the most reliable and simplest method for now is to first convert them into Bitcoin and then into local currency not since there are no purchasers or companies accepting them but because the least difficult way is to just forget about finding the right people to use the cash directly without needing to exchange to fiat at all, thankfully Bitcoin is heading the right way where we always desired it, having the potential to only make use of it as the mainstream currency.