So when considering cryptocurrency wether you are thinking of investing using it for transaction or building technology around it there are several important factors to have in mind this factors includes.
For building Ethereum, for currency (transaction) Bitcoin and also for investing too. You can gamble with some altcoins but your major investment should always be in Bitcoin for protection and profitability. Any currency built on the Blockchain should automatically be a crypto and it shouldn't matter if the crypto is decentralized or centralized as that doesn't make it any less of the crypto but just because they're crypto shouldn't mean they're potential good investments. We have more scams than legit crypto just so you know and no strategy or any qualifications can give you a more perfect crypto than Bitcoin.