Can I use these words for decimals like 0.1 reading?
For decimals, the only generally accepted way to read "." is "point"—it is the decimal point, after all, not the decimal dot.
That said, things aren't as clear cut for numbers that look like decimals, but use the period as a separator rather than a decimal point. For example, "Web 2.0" or "Section 3.2.1". In these cases, it seems both are acceptable. According to ZDNet's article, both tend to be used.