Home electrical work is a great example, because like crypto, there are many opportunities to screw up. The Home Depot book usually assumes that the underlying electrical system is reasonably modern and implemented in accordance with the NEC.
Not always true! Your simple change like adding a GFCI outlet or a socket somewhere may not behave as expected if some idiot 30 years ago did something like attach ground to the neutral wire. Or, unbeknownst to you, that old line that you make a pigtail with may be an aluminium wire, which requires specific hardware to safely splice. 5 years later, the trivial act of installing a ceiling fan could be a fire.
Crypto is similar, there are lots of icebergs lurking around. That doesn't mean that you need to fear it, but you do need to know what you are doing, or take measures to validate that what you're learning and applying is accurate.
Not always true! Your simple change like adding a GFCI outlet or a socket somewhere may not behave as expected if some idiot 30 years ago did something like attach ground to the neutral wire. Or, unbeknownst to you, that old line that you make a pigtail with may be an aluminium wire, which requires specific hardware to safely splice. 5 years later, the trivial act of installing a ceiling fan could be a fire.
Crypto is similar, there are lots of icebergs lurking around. That doesn't mean that you need to fear it, but you do need to know what you are doing, or take measures to validate that what you're learning and applying is accurate.