I usually Invest a very small amount of bitcoin to another coin because I know this time is very crucial to invest in any new coin or even in an old coin.
Any suggestion from your side which is good for long term
Have you ever heard of DEFI? Currently there is a staking program, where you can buy a crypto asset (such as WBTC or ETHEREUM) and you get dividends from that staking, this is a good thing especially if I plan to invest long term so staking is something I really recommend, you You can also do DCA by staking, currently there are many coins that provide a staking feature for their token investor.