An alternative to bitcoin can be ethereum, as well as several tokens - forks of the first cryptocurrency, the yield of which is up to 70-80% while bitcoin is at the level of 40,000 - 50,000 dollars. At the same time, one must remember about the risks and consider possible losses.
Depends on what you mean when you say alternative. Is it alternative for investment or alternative for any other transactions or what? For investment, well yes, it's not that bad to choose eth but for other purposes, eth is not a good choice anymore.
People are now going for matic, bsc and similar lightweight coins but these coins can also work better in terms of investment because they haven't reach their full potentials yet. That's right, risk and losses should be considered too apart from the profits so that we will learn how to limit our selves. Earning sufficient is better than going overboard but not getting a profit at the end and worst you still lose.