I don't think so, that BTC is not a good investment. Although this coin is volatile, BTC is still trusted for investment, moreover for a long-term investment. However, I also agree that some cryptos maybe not good for investment, they can be a way for trading to get short profits.
It is very different from the precious BTC in 2017 where the coin has very high value. I hope that after halving, BTC will have better value again.

Simply, BTC can be said as only one best crypto for investment although ETH and other cryptos may also offer high value. We can trust other coins, but it does not mean that they are very valuable.