I don't think it is possible for Stellar to overtake Ethereum in the current year or the next year because Ethereum occupies $40B marketcap where Stellar has $1.5B marketcap. It means 26 times higher than Stellar marketcap. If Ethereum remains same price and Stellar price hit $1.90 per XLM then Stellar can touch the Ethereum. Can it possible in the near future? In the long run, anything can happen but i don't think it is possible for short time.