Is it illegal to use trading bots?

Could you clarify for me, is the use of Trading Bots in cryptocurrency or financial markets considered illegal? I've heard differing opinions on the matter and would like to understand the legal standing of utilizing such automated tools for trading purposes. Additionally, are there any specific regulations or jurisdictions where their use may be prohibited or subject to stricter guidelines? I'm eager to gain a comprehensive understanding of the legal landscape surrounding trading bots in this context.