It is worth if you know to be careful about which bounties you should participate in. Like looking a needle in haystack, a million cryptocurrencies with many new ones and their bounties, no doubt there will be some worthless one. Yes, bounty in 2020 still works but only for those that are selective.
Not just for those who are selective but mainly those who are ready to take chances with any good projects, it's all about more works and energy spend, also it's better to have the zeal to always work more, do not be lazy