Yes, Bitcoin is very safe now but the the leverage is very low cause the high market cap, but I still can recommend Bitcoin.
An good and safe Altcoin option is Litecoin Cash. It has lost over 99%. So it very cheap.
Litecoin Cash is the brother of Litecoin and is correlating since 2021 with Litecoin. There is a lot of development there. Take a look on CoinMarketCap, whitepapers and so on...