Being skillful is going to put you into places. While in having the document of education will also give you a lot of opportunity. But I think those with skills will be able to survive whatever happens again to this world. Having formal education is going to give you a good start but having a good skill will make you stay in the longer term to whichever career you're wanting to be. Nothing wrong to have education certificates, diplomas and other formal papers to prove what you've finished but someone who's skilled will also have those opportunities given that the company is looking for such.
Both of skill and educational certificate most important part how to get many opportunity to be able to apply or get job opportunities in several large companies, if depend only one between skill or educational certificate I think difficult get apply for top companies. However skill can help us more if want build up our self business without get support from educational certificate still help more for us. For awhile, senior high school educational certificate not really worth it during many top company have minimum certificate recruitment for employer as strata one degree.
If want not formal working, you can depend only with skill but looking opportunity at formal for awhile you really need educational certificate without its you can't apply at any formal job.