I understand what you mean by investing in crypto.
Investing in blockchain has another meaning.
Blockchain is a technology, investing in blockchain is studying new ways to improve blockchain.
Blockchain investment is not only for profit but also an investment in the future, it is longer-term than any way of making money.
he didnt mean investing in crypto but he was talking about the blockchain only . cryptos were related to crypto so its qualified . when you buy cryptos you are also investing in blockchain .
also the op only talks about investing , in a way of buying or to profit but not investing the other way around but you can always invest in a way that you like whether its for profit or for expanding your knowledge on this technology.