Deterioration describes a gradual process - this is not what happens.
Files of all sorts can get corrupt - there might be a 'bit flip' (a 0 turns to a 1 or vice versa) during saving, or maybe the sector/NAND cell of your storage device gets faulty (this is called 'bit rot'). Also, it is easy for your operating system (OS) to accidentally delete files - it cannot delete prints, though.
The solution is using backups (and, on a smaller scale, good software).
Different file formats are impacted on different scales by bit flips or bit rots, and there must be made a compromise in this instance: While formats that feature higher compression can pack the image in fewer its - if every millionth bit would typically flip, then binning half a million is probably worth it - they typically are not able to handle faulty bits as well as TGAs or BMPs. I have no idea how well or badly RAWs fare in this comparison, but you could try using a HEX-editor and changing a single value in one of your RAWs (make a copy of it before doing so!) and see what happens.
Also, as noted by others, RAW formats (except DNG) are proprietary, so only the manufacturer knows exactly how to read them. It might well be that your CRW files cannot be read by software 50 years from now, as noone cared to maintain the code to interpret them - or maybe they get interpreted in a very different way. Either way, for long term storage (i.e. not "until I have time to process them"), I would recommend to at least save an unprocessed JPEG or something alike, as I guess that JPEGs will be able to be read for some more years.
Different file systems (FS) handle bit rot differently. NTFS, FAT, ext4, and most others just save your file, while inegrity checking FSs like btrfs, ZFS, ReFS, and some more also save the hash-value of every file. Without a backup, this does not prevent anything, but at least they tell you when a file got silently corrupted.
On the backup end, I would highly recommend a strategy that involves a snapshot-like structure, like differential or incremental backups. There are lots of good (and free) tools around for this purpose for all operating systems, for example Duplicati I'm not affiliated, I just wanted to offer an example that I know is free and works pretty well .
On the hardware end, checking (and testing) your storage device's health regularly can help. Not every dying HDD tells you that it is about to fail in its SMART values, but if the SMART values look bad, I would definitely replace it ASAP. Do not use flash memory cards or sticks as backup or main storage - they are not designed for this purpose. Also note that not even DVDs stored under optimal conditions live forever.
My personal strategy involves most of the above: I use a integrity checking FS for both my main storage drive and the backup drives, so as soon as something goes bad, I will be noticed. I have my computer check the drives every now and then for errors on the hardware side of things just to be sure. And my backup strategy involves incremental backups, so in the case of a user error (the most likely thing to damage your files), I can easily restore the state from a week ago.
On a side note: Backups are cheaper and easier on digital files - prints can burn, mold, soak through, bleach out,... - while these are all things that a caring person can easily avoid, installing Duplicati and buying two extra disks (or using some old ones) seems to me a bit less troublesome. But I am a digital native and still I think that photos look better when printed (or developed in case of film) :-)