Is vaping using things like DynaVap safer than other types of vaporizers?
There are vaporizers and liquids to treat very cautiously. Many materials you could make a vaporizer and especially the heating assembly would include hazardous offgassing.
Likewise you would want to be very careful about knowing the source and content of liquids. They are essentially unregulated.
Strangers on the internet selling you ingest to make a small amount of money are not particularly trustworthy.