It's an SSD, It's supposed to live for 10 years. What could go wrong? The first hard drive my MacBook Pro had still lives. I can't imagine why my MacBook Air wouldn't live for 5 more years.
I have HDDs older than 10 years which still work, I have had HDDs die after less than one year. Theoretically SSDs can live for 10 years (though no real life experiences can be posted yet, as SSDs are not that old yet), but what if yours does not?
Anyway, depending on how much of your data is valuable to you, you could either look into DropBox (2 GB free, but you can get up to 18 GB or so with referrals and other tricks) or iCloud for small text documents, or spend 50 to 100 USD for one or two external HDDs if you have more than just some GBs of text and other documents.
I have one 500 GB HDD for my photographs (digital and analog) libraries and editing documents, one 500 GB HDD with my personal video footage in an editing friendly format.
Both 500 GB HDDs get backed up to one 1 TB HDD via
CarbonCopyCloner.
And that 1 TB HDD gets backed up to another 1 TB HDD via CarbonCopyCloner.
Therefore I have three copies of my important data. Those fur HDDs are cheaper (300 at the most) than spending more than 2000 for data recovery for two failed HDDs (the 500 GB ones).
If you value your data and don't want to lose it, spend a bit to back it up. It might be, that you never have to fall back on a backup, but what if? Data recovery with kaputt SSDs is not really my area of expertise, but I imagine it to be much harder than with HDDs (which you can dissect quite easily and find bits here and there on the platters).
It is up to you.