Former PayPal CEO and Founders Fund co-founder Peter Thiel has confirmed he still holds bitcoin, reiterating previous remarks wishing he had bought more earlier.

Responding to a question from CNBC’s Andrew Ross Sorkin at the Aspen Ideas Festival on Thursday, asking if he had sold any bitcoin, Thiel said, “I still hold some. I didn’t buy as much as I should have.”

However, Thiel didn’t sound too optimistic about bitcoin’s price potential, adding, “I’m not sure it's going to go up that dramatically from here.”

In February, Reuters reported that Peter Thiel’s venture capital firm Founders Fund had invested $100 million in both bitcoin and ether last year, at a price below $30,000.

Founders Fund reportedly first began investing in bitcoin in 2014, making $1.8 billion by selling before the …