You have to use a mark for trade (in UK, EU, at least) to maintain a trademark. So, you can trademark a bunch of stuff but a challenger can point out you didn't

You have to use a mark for trade (in UK, EU, at least) to maintain a trademark. So, you can trademark a bunch of stuff but a challenger can point out you didn't use the mark and you can lose it - abandonment. A trademark isn't a trade mark unless you're using it for 'trade'! Not legal advice. Personal opinion, in no way relates to my employment.